Underoos are children's cartoon underwear depicting cartoon characters. Popular cartoon characters on Underoos include Superman, Spider-Man, and Scooby-Doo.
by teul2 September 25, 2006
One time I was getting changed, I took my shirt off and some kid pantsed me, this left my thomas the tank engine underroos completely exposed. They pulled them up and hung me on a hook, my underroos did not snap, break, or tear for twenty minutes. Which left twenty minutes for people to laugh, and turn around and spank me. I now receive wedgies on a daily basis, all in embarrassing underroos, sometimes though I wear diapers to avoid them.
by Johnny Tightlipss March 16, 2019