The in-bed mathematics that one performs in order to calculate how many hours or minutes they will be able to sleep for if they fall asleep immediately. Usually this is done in desperation after failing multiple attempts at falling asleep. The calculations usually begin while uncomfortably lying awake and trying to force yourself to sleep, you use the time you intend to sleep by and the time you have to get up, and all time in between is the Mathematress calculated sleep time.

*Guy looks over at the clock* "Shit it's already 3 and I have to be up at 8...well Mathematress says I'll only get 5 hours if I can get to sleep right now.....right now......damn!

Mathematress by Shunsui December 24, 2010

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Mathan

That one guy with a song for every person and every day of the week.

"Did you see that guy? He just told that girl that she reminded him of *Insert song here*! He totally pulled a Mathan!"

Mathan by Peanut Butter n' Lettuce December 6, 2017

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Mathamphetamine

a math problem that gives you that sort of "high" when you finally solve it.

Man, that homework had some real Mathamphetamines in it.

Mathamphetamine by chameleon215 January 7, 2019

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Marshall Bruce Mathers

This is the real name of the rapper Eminem.

Marshall Bruce Mathers
Born October 17, 1972.

Marshall Bruce Mathers by Risown January 3, 2009

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