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1. An anus which has been probed and penetrated to the point that one's head will fit inside their respective anal cavity.

2. Anal cavity that can entertain objects 12 inches in diameter or larger.
Hey John, get your fingers out of your asshole! You already have a slim dumas. You want to end up with a flaccid, amorphous gaping dumas too?
by Ham Glaze Washington November 26, 2010