The resulting pain from being kicked in the sack (see also nuts, balls, testis, taint grenades).
Holy sh** I've got the groothuis, I'm going to throw up.
An ignorant 16 year old who hangs out with the ugliest highschool girl in the world and has a large cock. Also never gets online when people tell him to unless if it’s his girlfriend.
-Isaac Groothuis get on
-No
-*girlfriend tells him to get on*
-alright boys I’m getting on
Boyfriend of Kassy (baby girl)
Yo who’s that guy with the tootsie? Oh, it’s Isaac Groothuis