Top Definition
A rare internet troll.
A trollbrain uses more coherent posts or spam than regular trolls.
The greatest weakness of a trollbrain, and the main factor that sets it apart from a troll, is that it has the ability to feel pain due to flames.
Some trollbrain tried to argue the legitimacy of a flux capacitor with me!
by Trollbrain August 06, 2008

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"Troll brain" refers to what happens when your testicles are side-by-side and are pressed firmly against the clothing covering your testicles; which will leave you with a "troll brain."
When the coach leaned back in his chair, wearing sweat pants, he opened his legs to reveal his troll brain.
by Karl_Hungus June 21, 2005

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