An innuendo used to describe the T H I C C posterior of the mother of your own mother/father. More specifically, when it is old and smells peculiar like an old cheese wheel.
"I was having a pretty shit weekend, luckily I got a bit of Grandma's cheese wheel which made things more bearable."
by Jebby <3 September 24, 2017
Get the Grandma's cheese wheelmug.