Slang for "You’re very slow”. Not the brightest person, this person doesn’t have to be physically old.
Me:so ya jeff ran to school today
Friend: NO WAY
Friend 2: wait who?
Me: ya he was late
Friend: Poor dude, his house is far from school
Friend 2: WHO.????
Me: JEFF. Keep up grandma
Friend: NO WAY
Friend 2: wait who?
Me: ya he was late
Friend: Poor dude, his house is far from school
Friend 2: WHO.????
Me: JEFF. Keep up grandma
by The True Oracle April 19, 2018
Get the keep up grandmamug. The act of ejaculating inside an elderly woman's anus then proceeding to pull your penis out and urinate in the elderly anus.
by ryangilflover June 4, 2024
Get the Grandmas McFlurrymug. A girl who acts like an old lady. Dresses like an elderly woman, goes to bed early, curses, and is very opinionated.
by BabyRuthie January 15, 2019
Get the Grandma Rosemug. by technologygreatgranny May 24, 2020
Get the technology grandmamug. by Isamsmart November 3, 2019
Get the Grandma Nutsmug. Agnes was such a cumslut, the boys and I gave her a Grandma McFlurry to let her ashes rest as she did.
by Gelly7 June 2, 2024
Get the Grandma McFlurrymug. 