Grandballin' 

Sex with someone over the age of 65.

"I was grandballin' your mom all night"
"You sneaky motherfucker!!"
"Exactly."

Grandballin' by scrappington2 September 20, 2014

grandbullin

To dream up schemes that arent practical. To think of things that seemed to be doable while being planned, but in reality they are virturally impossible

Man u cant climb ontop of that building with just a pair of screwdrivers, U grandbullin.

grandbullin by Tha Whisper king January 28, 2008