Top Definition
Mad Brains is a synonym for the incidence of receiving a very good blow job.
Man, that girl gave me mad brains last night.
by pba24899 February 20, 2010

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Someone who is crazy, or acting crazily.
"Look how recklessly that man is driving. (he is a) madbrain"
by bananamilkshakefiend October 15, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt