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 small circumcised penis
(in jew talk)
can be used as a:
noun, insult, or exclamation
"Dude, you have a yehei shmei shmuck!!..