Front Skids 

The mark left by a penis, when extracted from an anus and placed back into underwear. Brown/Dark green fecal matter inside the front of a man’s underwear. Usually 2' inches in length with a potent smell.

After me and Marilyn made love i came across a suspicious mark in the front of my underwear I came to the conclusion it was front skids.

Front Skids by Paul Casal/Tom Gilbride January 23, 2006

front wheel skid 

cockney rhyming slang, front wheel skid, yid, jew.

look at that front wheel skid just fell under that bus.

front wheel skid by christu September 26, 2006