1. An exclamation of cheeriness, victory, or overall happiness. When using this meaning, you must yell it and move your head back and forth in a pigeon-like manner.

2. Implying that you wish to have sex with the person your 'unce' is directed at. Often, drool is also released from the mouth while saying it with this meaning.

3. Butt
1.
Teacher: Here are your papers everyone, Joe, good job!
Joe: YES! Unce unce unce unce -walks around in circles, bobbing head back and forth-
Teacher: . . .

2.
Joe: Man, I am so happy that I aced that essay----
Sue: -whips hair around-
Joe: Unce! -drools-
Sue: GASP -slaps Joe-

3.
Joe: Oww. My cheek...
Bob: Sue again?
Joe: Yeah...but she has such a hot unce!
Bob: -nods-
by Sipping Juice February 5, 2009
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Suprising or exciting, also expressing embarassment to others.
"I heard Jimmy has no parents"

some other person: "Unce"
by andy July 27, 2003
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Pronounced "uh-ts" with a hint of an oo sound at the beginning. Often said to define the bass beat sound that rave club music makes. Used when there is no music and you are just acting it out by rave dancing.

"this music makes me want to unc unc unc unc unc"
by HANABI December 23, 2007
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The exclamation of sexual pleasure derived from everyday, non-sexual events. And sex. What? With me?
1) Claire: What did you get on your math test?
Taylor: A hundred percent, yo.
Claire: UNCE! All over that shiiiit.

2) Claire: Look at that hot piece of booty.
Taylor: Unce-a-lunce.
by Taystee Taystee September 21, 2007
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Can be related to anything sexual such as; sex, masturbation, anal.
I'm away for an Unce

or

Pfft, i'd like tae gee her an Unce.
by ereheis March 7, 2012
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1. UnCe = $$$
2. UnCe also can be used as an exclimation, or in place of profanity.
(UnCe is pronounced with a soft C like the sound a snake makes 'hiss'"Un-ss" and must be spelt with alternating caps U n C e )
Infector, "Yo Shinya you see those Spade kills?"
Shinya, "UnCe son! That was money, you UnCed that guy in the ass.
by Infector September 30, 2003
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That one uncle who is always doing crazy things with their nieces or nephews that ends with them getting hurt or scaring the piss out of them. Everyone has one.
Sister: Is my daughter out playing with her Unc-Hole?
Mother: Nope, she just came home crying because her Unc-Hole scared the piss out of her again.
Sister: He's way to crazy to be playing with her, she's only 4.
by WIldWillie November 9, 2015
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