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Slang

30 Slang Words beginning with O

Slang is a kind of language consisting of very informal words and phrases. Slang is more common in speech than in writing. Slang words are often used in a particular context or by a particular group of people.

These are English slang words beginning with the letter O. Click on a slang term for example sentences, notes, origins, quizzes and answers.

Slang

ocker Australian English

a crude and obnoxious Australian

OD

to take an overdose of a drug

oddball

a strange or eccentric person (n.) | strange, weird (adj.)

off American English

to murder, to kill

off the hook

1. no longer suspected of guilt 2. no longer obliged to do something

off the wall

eccentric, extreme, unconventional

offbeat

unconventional, not typical, strange

oi! British English

a sound used to attract someone's attention, like "hey!"

okay | OK

all right, acceptable

old bat

an unpleasant old woman

old hat

old-fashioned, uninteresting, overly-familiar

old lady

wife, girlfriend, mother

old man

father, husband, boyfriend

old school | old-school

from a previous period, and usually highly-regarded

old-timer

an old person

oldie

an old song, film, or TV show that's still enjoyed by many people

on fire

to be doing something really well

on the blink

out of order, not working

on the level

honest, truthful

on the mend

to be recovering from illness or injury, getting better

on the rocks

facing difficulties, esp. of a relationship or a business

on the take

to be receiving illegal payments or bribes

on the wagon

not drinking alcohol, esp. of an alcoholic or a heavy drinker

once-over

a quick inspection or search

one-night stand

a sexual relationship lasting just one night

oodles

lots of, a great number or amount of something

oomph

power or force

oops!

something said after making a small mistake or having a small accident

out (1)

not in fashion, not trendy

out (2)

to be openly gay

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