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1.
A way of saying 100; mostly used among the rap/hip-hop community, and usually referring to money.
Home Boy #1: Yo dawg how for an ounce of that dank weed?
Home Boy #2: I'll hook it up for 2 bucks.

Jamal: Hey fool how much you weigh?
Hakim: About a buck sixty (160).
by prolifiQ August 10, 2008
 
2.
a. Meaning one American Dollar.
b. Also can pertain to a male Deer.
a. Hey Brad, this pizza is only a buck!
b. I almost killed a buck the other day.
by Brad Germain March 17, 2008
 
3.
100mph used usally in street racing
I was doing about a buck 20 last night
by Jake Swift December 08, 2004
 
4.
A Skinny girl That doesn't weigh more than 100 pounds.
"Man did you see her she couldn't weigh more than abuck or abuck 15."
by galexygirl1 July 12, 2009
 
5.
It means a 100 dollars.
My ACGz were a buck 20
by Crispin Kalarickal August 28, 2007