English Idioms Beginning with O

English Idioms Beginning with O
- oat opera
- odd and curious
- odd duck
- odd fish
- odds and ends
- of a
- of age
- of a kind
- of all loves
- of all people
- of all places
- of all things
- of an
- of a piece
- of choice
- off the table
- off and running
- off balance
- off board
- off chance
- off color
- offer affordances
- offer one can't refuse
- offer one's condolences
- offer up
- Officer Friendly
- off kilter
- off one's box
- off one's dot
- off one's feed
- off one's game
- off one's hinge
- off one's hinges
- off one's nut
- off one's own bat
- off one's tits
- off one's tree
- off one's trolley
- off pat
- off roader
- off the back foot
- off the bat
- off the beaten path
- off the beaten track
- off the cuff
- off the deep end
- off the face of the earth
- off the grid
- off the hook
- off the radar
- off the rails
- off the reservation
- off the scale
- off the shelf
- off the top of one's head
- off the wagon
- off the wall
- off to the races
- of late
- of one mind
- of sorts
- often wrong, never in doubt
- of the same stripe
- of two minds
- oh dark thirty
- oh my goodness
- oh dark hundred
- oh my
- oh my goodness gracious
- oh my gosh
- oh well
- oil and water
- oil burner
- oil trash
- old as the hills
- old boy network
- old chestnut
- old enough to vote
- old fart
- old-fashioned look
- old flame
- old fogey
- old hand
- old hat
- old head on young shoulders
- old money
- old salt
- old saw
- old school
- old song
- old stager
- old stick
- old wine in a new bottle
- oll korrect
- on someone's account
- on the back of
- on the edge
- on the lam
- on the pull
- on account of
- on acid
- on a first-name basis
- on a full stomach
- on a kick
- on a lark
- on all fours
- on a losing wicket
- on and off
- on an irregular basis
- on a regular basis
- on a shoestring
- on a tear
- on average
- on a whim
- on board
- on brand
- once bitten, twice shy
- once again
- once and for all
- once in a blue moon
- once in a purple moon
- once in a while
- once or twice
- on cloud nine
- on course
- on demand
- one at a time
- one step at a time
- one's hour
- one-way ticket to Palookaville
- one after another
- one age with
- one and all
- one and only
- one and the same
- one brick short of a full load
- one could hear a pin drop
- on edge
- one fell swoop
- one flesh
- one-hit wonder
- one-horse race
- one-horse town
- one in the eye for
- one-man band
- one moment
- on end
- one-night stand
- one note
- one off
- one of His Majesty's bad bargains
- one of those things
- one's back is up
- one's bark is worse than one's bite
- one's blood is up
- one's blood runs cold
- one's days are numbered
- onesey twosey
- one's heart in one's mouth
- one side
- onesie twosie
- one's jig is up
- one's lips are sealed
- one small step for man, one giant leap for mankind
- one's name is mud
- one's socks off
- one star
- one step ahead
- one step forward, two steps back
- one's word is law
- on eternal patrol
- one too many
- one-track mind
- one-trick pony
- one up
- on fire
- on good terms
- on hand
- on hold
- on ice
- on in years
- on its merits
- only game in town
- only time will tell
- on one's bill
- on one's deathbed
- on one's feet
- on one's high horse
- on one's knees
- on one's last legs
- on one's lonesome
- on one's own
- on one's tod
- on one's toes
- on one's watch
- on opposite sides of the barricades
- on pins and needles
- on purpose
- on second thought
- on sight
- on someone's dime
- on someone's doorstep
- on someone's hands
- on someone's mind
- on steroids
- on stun
- on sufferance
- on talking terms
- on tenterhooks
- on the anvil
- on the back burner
- on the back foot
- on the ball
- on the bounce
- on the brain
- on the breadline
- on the bubble
- on the button
- on the cards
- on the clock
- on the cuff
- on the cusp
- on the cutting room floor
- on the debit side
- on the dot
- on the double
- on the down-low
- on the drum
- on the dry
- on the edge of one's seat
- on the face of
- on the face of it
- on the fly
- on the fritz
- on the front foot
- on the game
- on the go
- on the gripping hand
- on the heels of
- on the horn
- on the horns of a dilemma
- on the hush
- on the ladder
- on the level
- on the line
- on the loose
- on the mark
- on the mend
- on the money
- on the one hand
- on the other hand
- on the other side of
- on the outs
- on the outside, looking in
- on the pill
- on the plus side
- on the point of
- on the prowl
- on the QT
- on the radar
- on the rag
- on the rails
- on the rampage
- on the receiving end
- on the rise
- on the ropes
- on the run
- on the same page
- on the same wavelength
- on the shelf
- on the side of the angels
- on the skids
- on the sly
- on the spot
- on the spot
- on the square
- on the street
- on the table
- on the toss of a coin
- on the trot
- on the up
- on the uptake
- on the wagon
- on the wane
- on the warpath
- on the way
- on the whole
- on the wrong side of history
- on thin ice
- on top
- on top of
- on top of the world
- on track
- on with you
- on yer bike
- oof bird
- open a can of whoop ass
- open armed
- open book
- open-door policy
- open doors
- open fire
- opening of an envelope
- open one's legs
- open one's mind
- open one's mouth
- open Pandora's box
- open season
- open someone's eyes
- open the batting
- open the door
- open the floodgates
- open the kimono
- open wide
- opinions are like assholes
- opposite number
- or else
- Oreo cookie
- orgiast
- or something
- or what
- or words to that effect
- ostrich policy
- other end of the ball
- other fish in the sea
- other half
- other head
- other side
- other side of the tracks
- other than
- otherwise engaged
- our era
- out cold
- out of sight, out of mind
- out and about
- out for blood
- out loud
- out of a nightmare
- out of bounds
- out of central casting
- out of character
- out of date
- out of fix
- out of frame
- out of gas
- out of house and home
- out of kilter
- out of line
- out of luck
- out of nowhere
- out of one's box
- out of one's depth
- out of one's element
- out of one's face
- out of one's mind
- out of order
- out of place
- out of pocket
- out of proportion
- out of reach
- out of shape
- out of sight
- out of someone's way
- out of sorts
- out of the blue
- out of the box
- out of the chute
- out of the frying pan, into the fire
- out of the gate
- out of the loop
- out of the ordinary
- out of the picture
- out of the question
- out of the running
- out of the way
- out of the woods
- out of thin air
- out of this world
- out of touch
- out of wedlock
- out of whack
- out on a limb
- out on one's feet
- out on the tiles
- out-paramour the Turk
- outpope the Pope
- out sick
- outside chance
- outside the box
- outside world
- out the window
- out to lunch
- over a barrel
- over and out
- over and over again
- over my dead body
- over nine thousand
- over one's head
- over one's skis
- overstep the mark
- over the hill
- over the hills and far away
- over the line
- over the moon
- over the top
- over the transom
- own up
- ox is in the ditch
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