French buscuit 

A turd.

Man, I gotta drop a French Buscuit off in the toilet, it' has been baking all day like a bun in the oven.

French buscuit by P-Nyle November 13, 2016

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"

french biscuit by Captain Bird's Eye July 30, 2008