Neck

When someone says something really DUMB you say That's a neck and that person should slapp their neck if they don't THEY GET A SELF SERVE NECK. Another way of doing so if placing your hand in a cup with your thumb up to the tips of ur fingers.

Starkeisha: What's the answers to Mrs. Muntee's homework assignment?
Me: That's a neck😗

BettyBae: puts up a neck

Me: I don't need this crap

BettyBae: gives a self serve neck