alley biscuit 

a piece of road asphalt

Johnny chucked an alley biscuit at an abandoned car.

alley biscuit by Markimus May 2, 2006

Alley Biscuit 

A slang used in reference to an object capable of doing damage to someone or something. An Alley Biscuit is mostly used either in self defense or for B&E(breaking and entering).

Person 1-"Hey they say that you're going to get that ass whooped today."

Person 2-"I ain't worried about a damn thing. I'll just grab an Alley Biscuit and take care of em."

Person 1-"Yeah, you might wanna do that."

Alley Biscuit by Tuk Toi January 29, 2010