ONS is an acronym indicating the common dating phenomenon One Night Stand. You can use the acronym ONS to indicate a person with whom you have had said One Night Stand.
You: "Uh-oh, guess who just walked in?"
Me: "Shit. Who?!"
You: "ONS"
Me: "Great... and I thought I'd never have to see him again."
by Roberta Pincer April 11, 2005
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Derived from 'on it'

1. a statement of willingness to take part in task

2. Statement of approval

Antonym: Not ons it
A: Yo! do you wanna get drunk tonight?
B: ons it!

A: Bro are you ons it or not?
B: Im not ons it man
A: OH SKEEN!
by HHMMPP March 17, 2009
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What Andy says in agreement to almost everything, even If the question is “pint of Guinness please”
by Staifreak March 13, 2018
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The first episode of the first season of a show (season one, episode one). The first level in a game with multiple worlds (world one, level one).
by PhillyHippy September 24, 2019
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In basketball when a player is shooting, gets fouled while shooting and makes the attempt and has a foul shot to come, the ref goes "two points and one......"
"player drives to the hole dunks and gets fouled, and has one foul shot to come or and 1"
by J-EmCee August 07, 2004
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