The act of pinching or pulling on your underwear though your pants in order to wipe your ass, often times creating a shit stain on one's tidy whiteys.
Did you see that guy grab the back of his shorts and jam his fingers in?...he's got a bad case of poochas gachas!
by Renegade Rider Palos Verdes August 29, 2014
by Lazarakoc August 30, 2020