What is Grundlesac?
1.
The flap of skin, in males, between the scrotum and the anus, which can be used for various things such as clipping flashing lights to. Grundlesac's can vary in size from droopy to so small that they can barely be noticed.
Damn Alex, that is so sweet how you can clip that pulsing belly button ring to your giant grundlesac.
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when you are amazed by sumthin that kicks ass and u explode
Matt: OMG this rox
Craig: OMGSPLOSION it does!!!!!!!
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1.
Taking a dump on a dive mask, then putting the mask onto your passed-out drunk friend.
You keep mouthing off, you're gonna go for ..