An act of aggression in which one uses the last sheet of toilet paper without replacing the roll, causing the next person that takes a shit to have to stand up and get more, effectively turning their asscheeks into a Rorschach shitblot test.
"Bro, why are you so late all the time? " "Dude, my asshole roommate keeps Rorschaching me. This morning I had to go on a mud-butt mission to find toilet paper , take a shower and basically start my whole day over." "That sucks, man. What a dick."
by RystuShocklefard January 03, 2016
by AKA Jew July 12, 2009