|Born||February 11, 1928|
|Occupation:||Owner of a café|
|Appears in:||KaBlam! (Better Than A Poke In The Eye), The Off-Beats|
|First Appearance:||You've Tried The Rest! Now Try The Best! (KaBlam!)|
|Last Appearance:||KaBlam! James KaBlam! (KaBlam!), An Off-Beats Valentine's (Nickelodeon)|
|Voice Actor:||Mo Willems|
Grubby Groo is a character on The Off-Beats, seen on the Nickelodeon animated anthology series KaBlam!. Looking like a beatnik, he is the adult friend to the Off-Beats and is the only adult that knows the Populars are just mean kids, despite their "nice act" when he walks by them.
- The character originated in a 1993 Sesame Street segment also made by The Off-Beats creator Mo Willems.