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In the same tradition of 'deuce,' a once is going number one in the bathroom. A once is a noun, like a piss.
Hey I'll be right back, I got to go drip a once.
by RGW May 27, 2008
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2
South Korean Girl Group TWICE fandom.
ONCE: I just bought KNOCK KNOCK
Thrice: Twice sucks
ONCE: I'll KNOCK KNOCK the **** out of you
by sone & once February 12, 2017
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3
Another term used in the place of awesome. It can also be used when one agrees with something someone else has said, or agreeing to something. In agreement the word is said as unenthusiastically as possible, yet a nod is crucial. Is pronounced something like: waance
Girl 1: I got the new Coheed cd
Girl 2: Once!

Bob 1: Hey you coming with tonight?
Bob 2: Once. Like I would miss it

Guy 1: That movie was so gay.
Guy 2: Once.
by Nymphololly November 05, 2006
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4
Enough. Overtly so and inclusively.
by dajxd October 09, 2007
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5
The worst insult you can call someone. It is typically used when you are really really pissed off at someone.
Wow coach why are you such a fucking once all the time?
by Skipah123 April 01, 2009
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6
The new album from Finnish metal band Nightwish. Much more experimental than previous albums, but still unmistakably Nightwish.
My god, Once is so damn good.
by Nudger June 08, 2004
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