A fork of Rural Dictionary
A Great granny blaster is a young man who is groomed with beer and pies. This leads to the great granny wanking you off while you finger blast her dusty old snatch.
“Lee I’m going to see unice” Dion don’t do it your such a Great Granny Blaster.
The ultimate and the worst insult, worse than your mom and your granny.
your great-granny a gay tranny.