Slangonym

Based on the slangonym snow, referring to heroin and cocaine. In use since early 1920's.

... slangonym for female genitalia. Often used to mean "clown around", "cut-up" was also a technique used by Naked Lunch author William Burroughs of rearranging the words of an existing text to make a new work.

That other vaginal slangonym, twat, though, expresses no more than resigned despair or disdain.

camera obscura * a darkly comic slangonym for the anus

I hope you enjoyed that list of foul and derogatory "slangonyms."