Asschalk 

A poorly conceived and baseless statement, as though offered by someone so unequipped that he had to write it on the bathroom stall with his own poop.

Paul needed a quick response to the panel's objections, so he wrote it in asschalk.

Asschalk by Longhorned June 19, 2013

Ass Chalk 

After a long night of receiving anal sex the person wakes up the next morning long after it dries and farts wherein a puff of white smoke is expelled from their anus.

Whoa man face me when you fart or I will get a mouth full of ass chalk!

Ass Chalk by K-Doggg January 27, 2008