Noun. A variation of "poontang." Intercourse with some body you aren't morally designed to have sex with. Including minors, married persons, members of the clergy, incest, and sex between stepsiblings.The term is derived from the ABC tv series MISSING by which stepsiblings Boone (Ian Somerhalder) and Shannon (Maggie Grace) have sexual intercourse. Irony: the definition of "Boone" is truly French for "good," making "Boonetang" really imply "great poon." In consumption, however, it is "naughty poon."