1. A piece of ass that is acquired from a former significant other.
2. Getting some action from an ex-girlfriend without having any intentions to date her again.
Bro: Dude! I totally got a steaming piece of X-Pie from Jessica last night.
Dude: No way. I thought you two were donesies?
Bro: We totally are. I just thought I'd grab an extra slice.
Dude: Noice.
by Super_Soaker April 24, 2013