Buck = A male deer.
Knuck if you buck = Used when hunting. Simply hit your knuckles together if you see a male deer to create the effect of 2 deer fighting. (The antler effect.)
"Quick, knuck if you buck!"
...the buck (male deer) comes, and you can do as you wish with it.
Rowdy Clubgoer #2: "Well whatcha gonna no n*gga?! Knuck if you buck!!"
I betcha Im'a throw dem thangs,
So haters best to think twice,
"KNUCK IF YOU BUCK", CRIME MOB
2. Is used when one homie wants to throw down torwards another homie.
3. Is commonly seen when crunked white boys who think they are black, try to dance and get down.
(1.homie):KNUCK IF YOU BUCK!
(homie 1 & 2): KNUCK IF YOU BUCK BOY! KNUCK IF YOU BUCK BOY!KNUCK IF BUCK! KNUCK IF YOU BUCK!