What is Grundle Brush?
1.
a tooth brush like device used exclusively to remove crust from one's grundle and can be used as a derrogatory insult towards someone
dude! i totally switched my grundle brush for this guy's toothbrush!
OR
senor badass is a grundle brush for not being creative
See
2.
one who enjoys licking the grundle
Andy Bond
see taint thinner
Random Words:
1.
The act of a girl lactating on a guys dick to lube it up for anal sex.
Dude last night me and my wife did a mount holly milk maid.
See..