M&M [Insert Act]
M&M is when you get high, jerk off, and then do something else. It's like your brain is saying, 'I need to be high and cum before I can do this.'
He did M&M before the presentation and forgot his slides.
She did M&M before the date and showed up with a grin and a boner.
They did M&M before the party and got kicked out because they were too loud.