Delaware Lava Cake

A sexual act where 2 sexual partners spread their ass cheeks and connect their anus', and then proceed to shit into each other.

Did you hear johnny and his girl did a Delaware lava cake last night?

Mexican Lava Cake

When 2 girls poop on each other at the same time after eating a lot of greasy food!

"One time I havld to use the bathroom and I walked in on Sabrina and Cassie Mexican Lava Cakeing in the handicap stall"