granny junkie

One who is addicted to banging their friends' grandmothers.

A younger individual who likes to eat rank, dusty, sour pussy.

John: Damn, your g-ma is looking fine!
Dave: God...what's wrong with you she's 85?!
Mike: Dude, that doesn't matter to John, you know he's a granny junkie. He banged my grandma twice last week!