A derogatory term used to denote one's diminished mental capacity, i.e., comparing the size of the brain to a clit.
Whenever I smoke some couchlock weed, I get a severe case of clit brain.

I had to spend 10 minutes trying to get this clit brained customer service rep to understand my simple problem. Actually, during the 10 minutes I rolled and smoked a killer joint, so maybe it partly my fault.
by BobONtheKnob October 21, 2006

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