dry sinker

When someone doesn’t wash their hands after using the bathroom.

Dude 1: “You just took a dump in the bathroom and didn’t wash your hands? That’s disgusting AF!”
Dude 2: “No man, I washed my hands”
Dude 1: “Lies bro! I took a piss right after you bombed the bathroom and the sink was bone-dry! You are dry sinker!”