B.S.R.M.
A Butt Sauce Removal Mission is when your butt is leaking like a broken pipe and you have to run to the nearest toilet before you lose the war.
I did a B. S. R. M. in my classroom and my teacher was not happy.
I did a B. S. R. M. in my car and my friend made a joke about it.
I did a B. S. R. M. during a test and got a zero.