Meep

It is a word used by the popular Toontown Cat toon named Jaden who often says meep after being fucked by colorful cats.

Purple wifu: *grabs jaden's penis and sucks on Jaden's dick*
Yellow wifu with wings: *sits on jaden's booty*
PInk strawberry wifu: *jerks off jaden*
Jaden: MEEP!