The Big M Edit Meaning

1.

common term used by insecure teens trying to conceal talking about masturbating. Often used as a code word.

So dude I was doing the Big M and then my grandma walked in and scared the living jizz outta me.

See big m, big, m, masturbation, masturbate

2.

A subtle term for masturbation, used when you don't want to outright say that you are going to go masturbate.

"Be right back, I'm going to do a little of the big M."

See Suzi