M.A.R.S.
A long, brutal session of ass raping that goes on for hours. M. A. R. S. is the worst kind of fun, and it leaves you sore for days.
My friend’s cousin had a M. A. R. S. and it lasted 8 hours. He still has bruises.
I joined a M. A. R. S. and got kicked out after 2 hours. I’m still sore.
My brother had a M. A. R. S. with 10 people. He screamed the whole time.