When two men fight over the same girl a la the wishbone at Thanksgiving dinner. Whoever breaks off the bigger piece wins and the loser goes home, wishing he was the one boning her.
John and Steve were wishboning over Bethany last night.
A word that @maamlikesbondage uses even though they don't know the definition and get awfully defensive about it.
"They're asking to meet a duocorn, but they won't say what it is because they don't know what the word means."
