Nickelodeon Slime

Slime is a (usually) green semi-viscous substance that has been synonymous with Nickelodeon since its introduction on You Can't Do That On Television. It is typically dumped on a person's head in an act of either humiliation or celebration, in an act called being slimed. On You Can't Do That On Television, saying the phrase "I don't know" would result in the speaker getting slimed. Slime has been used on every messy game show on Nickelodeon in some way shape or form, and has become a staple of the Kids' Choice Awards.

Goin' Green
Nick Slime got cleaned up by Reptile in the first round