What is Grundleslap?
1.
A guy makes his pants tight so that the area above his dick if firm (usually by sitting down, you know what i mean) and then slaps it with his hand, in what would seem to be painful but is completely not.
I grundleslapped you mom last night
See
Random Words:
1.
a boy's wang or penis.
"So your telling me that a boy's penis is Johnny Whistle?"..
1.
The lead singer of the PussyCat Dolls. Plus one of the hottest girls on the planet
Nicole Scherzinger is the hottest girl on the plane..