Sans: "What's up."
Frisk: "I'm a stupid doodoo butt."
Sans: "Did you...did you just say 'I'm a stupid doodoo butt?'"
"Wow. I can't believe you would say that."
"Not only is that completely infantile...but it's also my secret codeword."
A individual who is infested with a sickness that presents itself on ones behind. Often consisting of a magical poopy forest that, in due time, envelops the host's buttocks. Originated from Las Vegas, Nevada.
Rawr: Look at Fluxxy, he's such a ~
Ari: doodiebutt!?!
Rawr: Exactly, a doodiebutt. d^-^o