What is Cat Brain?
1.
1. The showing of one's scrotum bunched up in one hand tightly so it resembles cat brains. Usually used to make someone look so you can then call them "gay" and a "fag" and with good reason.
Brian: Hey colin look at this
Colin: What
*Brian whips out the cat brains
Colin: WTF thats nasty
Brian: OMG you looked what a FAG!
See