is an abbreviation for "grandpa cock connoisseur". This
refers to someone (usually female) who prefers the penis
of older men, potentially elderly and senile. This
girl is in her early twenties and has had a series of daddy issues she is trying to solve by sleeping with
men her dads age.
Dude 1: "dude what's with maggie?"
Dude 2: "IDK man, she's a major
Dude 1: "a what?"
Dude 2: "a Grandpa Cock Connoisseur"
Dude 1: "oh yeah, she totally likes