A stretched butthole that no longer can retain its contents, such as feces and other various anal secretions.
The woman in the red dress is rumored to have a bunko due to frequent anal sex.
by Steven Petropoulos July 27, 2004
Top Definition
1. Noun: Something involving fraud, telemarketing schemes, or scams.

2. Noun: Old name for the fraud division of a police department.
1. I receive bunko emails daily, promising I can make millions of dollars.

2. Joe is a detective for the Bunko and Robbery Division.
by Purple Gurl February 24, 2011
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