Top definition
When an irrelevant comment slips through the mouth before the brain has a chance to filter it.
Example:
"So if the government wants to fix this situation there going to have to-"

"Bananas are great"

"What does that have to do with anything?"

"Sorry, brain burp."
by Triangle Jeff November 12, 2013
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The vengeful act of crapping on a lover's chest while they sleep.

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