when you playfully *slap* the back of someone's neck, usually after they make a dumb or obvious statement. saying "BEEF NECK!" is optional while administering the *slap*.
After Bobbi asked me where her keys were, I pointed out they were right in front of her on her desk, and then gave her a BEEF NECK!
reaction to when someone says something stupid, you slap them on the back of the neck while saying "beefneck"
Person #1: "Megan Fox isn't hot"
Person #2: "Beefneck"
When someone says a gay joke, something stupid, or something that deserves to be punished for. You also say beefneck while slapping the back part of their neck. Beefneck is a way to say that something is dumb; some people confess and put forward their necks and get hit, voluntarily.
Jimmy: Basketball is one of the dumbest sports ever.
(Slaps back of neck)
A girl who develops a strong neck due to taking repeated (pelvic) force to the face (thus resembling a cow's neck).
Aka.: bovine bitches, cattle neck, throat like a t-bone.
My girlfriend is developing quite a nice beef neck.
Damn! Them bitches got beef necks.
I want a beef neck'd girl.
Call me Old McDonald, cause my bovine bitches got cattle necks!