1 definition by Kelsey aka Hooker

really a motocross term but now is a word for cool kids only can be used to replace knock-knock in a joke or can be used as a response for anything
if ur name is not kelsey/kylie/momo/kristen/josh...u killed it
NAC NAC
whos there?
jp
jp who?
BONER!!!
by Kelsey aka Hooker June 28, 2006
Get the Nac nac mug.