French Drain

When someone diarreahs in someone else's mouth while wearing underwear, and the underwear filters the solid part of the feces. The resulting filtered liquid flowing through the underwear, and also the actual act, is called a French Drain.

I saw a video of a guy giving his girlfriend a French Drain, and I almost threw up.

French Drain by Chris311 December 22, 2006

french drain

It is when you pee into your partners mouth,and the remaining pee that flows out runs down their chest.

I totally gave that girl a french drain.

french drain by joe 13 April 27, 2010

Alabama French Drain 

When a guy is going down on his sister and sticks his tongue up her ass

Billy Bob was going down on his sister, Debbie and gave her an Alabama French Drain. He came up with a black tongue!

Alabama French Drain by WhiteCollarPosse March 3, 2019