when actual knucks and knucks via airmail (or air knucks) are physically impossible, knucks may be sent through the internet instead... hence knucks via email.

also known as e-knucks
dude 1: hey, did you here that our friend in Cali boned that chick?
dude 2: no way? send him some knucks via email
by Brian Harris August 26, 2006
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A secert term amongst homosexuals. (A question inquiring if you scream while having butt sex preformed upon you.)
Timmy: "Knuck if you Buck?"
Tommy: "Hell yeah!"
by TruGangsta October 7, 2004
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1. black people slang for fighting, orginated from the dirty south and heard in crime mobbs single "knuck if you buck".
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):Yo nigga!
(2.homie):what?
(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!
by LIL'JA March 21, 2005
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Knuck = Knuckles.
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.)
*deer approaches*

"Quick, knuck if you buck!"
*knucks*

...the buck (male deer) comes, and you can do as you wish with it.
by T-pain November 17, 2005
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KNUCK means "knock", thats just how they talk cuz theyz from tha ATL. IF U BUCK means "if u aint scared" So basically KNUCK IF U BUCK means "knock bitches and haters heads off if u aint scared"
we knuckin and buckin and ready to fight,
I betcha Im'a throw dem thangs,
So haters best to think twice,
"KNUCK IF YOU BUCK", CRIME MOB
by booty booty June 30, 2006
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only the best friggin song ever (props to the crime mob)! and thanks nick santarlasci for teaching it to us!
by only the coolest girl March 26, 2005
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