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similar to poontang but refering to anal sex instead of vaginal genitalia. heterosexual anal sex because female baboons are known for their red bottomness.

possibly refers to gay anal intercourse. also boontang.
"I'll get some baboontang up that hershey highway."

The bigger and brighter the female baboon bottom, the greater the fertility of its owner, according to a study published in "Nature".
by abysinth July 08, 2005