The lowest part of the back before the bum crack starts.
"Pull 'em up Jeff, I can see your grooge!"
by Gingrel December 20, 2014
1 more definition
Very, very, very, very cute. Incredibly cute. Like. completely and totally ridiculously cute.
A box full of incredibly cute kittens is Grooge.
by Torch5987 May 24, 2011