Top Definition
after the act of sodomy, you receive fellatio
that chick Rachael was a freak, she gave me mud brain, and i accepted in a drunken stupor
by Lord-Gore May 24, 2010
Occurs during to the seemingly FOREVER period of time between running out of ADD meds and becoming eligible to refill. In most cases, said person becomes unable to function in any sort of productive or sensible way. Withdrawal symptoms include but aren’t limited to; complete loss of ability to focus,
Nan: Oh my god, dude. I have total mud brain! Can't refill for 6 days!
Bert: I know, right?
Nan: I’m gonna go outside and drag my face on the concrete
Bert: Chewbacca does not live on Endor
by ChellChell September 09, 2010
A stupid person.
Maddison, you don't even know how to read, you're such a mudbrain
by The fact that September 23, 2015
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