Top definition
The more wrinkles you have on your brain, the smarter you are. Having a silk brain is the lack of wrinkles on your brain, denoting extreme stupidity or inebriation.
"Nice move, silk brain."
"What a silk."
"Did you see Matt at the bar last night? He got silky as hell."
by Ridicculus June 22, 2009
Mug icon

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