When you catch your grandma in a gangbang. You call her Gangma to basically shorten the two words: Slutty Grandma.
Bob: I caught my grandma in a gangbang... what should I do?
Me: Call her gangma, and join in on the act. It was used before, why not refresh it!
Me: Call her gangma, and join in on the act. It was used before, why not refresh it!
by caidanb8 November 3, 2017
Get the Gangmamug.