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!
n. From the words Mathematician and Magician: A person who's so good at maths that the answers they come up with and techniques they use seem like magic to those of a more ignorant nature.
John Nash (from "A Beautiful Mind") could be described as a mathemagician
A mathematician is a device for turning coffee into theorems.
Asked for a testimony to the effect that Emmy Noether was a great woman mathematician, he said: I can testify that she is a great mathematician, but that she is a woman, I
cannot swear.
Michael: Hey man, what are you doing?
George: Solving some math problems.
Michael: You need to cut off on mathematics man or we'll have send you to rehabilitation.