Definitions by Captain Bird's Eye

french biscuit

A small, moist, perfectly-formed turd. Possible origin: cockney rhyming slang with the word "shit".

"I'm proud of that french biscuit I layed earlier", or "Watch out, or I'll lay a french biscuit on your desk"

the area between one's balls and bum

"I went for a ride last night. I went flying over a bump and landed right on my jenk", or "I'm going to kick you in the jenk"