2 definitions by Commander Jacob

A severely worse version of a brain fart. When you do or say something extremely stupid or forget something everyone and their mother knows.
Dude, when I was taking that test, I had a really bad brain diarrhea.
by Commander Jacob August 27, 2017
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When you have butt-sex right after the person with the butt eats something spicy, adds danger
Me and the misses did a little volcanal just to see what it felt like.
by Commander Jacob October 14, 2017
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