half a meatball 

a stupid mother fucker whos brain is the equiv of half a meatball

she is a half a meatball because she is a dumbass motherfucker

half a meatball by Sam Greene June 15, 2008

Half a meatball 

Of a lower intelligence; stupid; half a brain

"9+10 = 21? Are you half a meatball?"

Half a meatball by Grawwz April 3, 2015

What are you, half a meatball? 

A phrase used to refer to something as stupid, dumb, or fail.

It also indicates that someone's brain is the size of half of a meatball.

EXAMPLE:

John: 2+2=5!

Bob: What are you, half a meatball?!

What are you, half a meatball? by piluke October 21, 2010