The math behind road lanes. When a lane exits from the main road, the number of remaining lanes must decrease by one. When a track is added via a ramp, the total increases by one again.
Biffa: "Oh this junction is chock-a-block! What it needs is some lane mathmatics!"
The study of the profits able to be made by starting a meth lab, a chain of meth labs, or just simply selling meth. Many drug dealers are methamaticians, and have carefully done the numbers and discovered the amount of profit they could make by calculations
Man1: Hey have you seen joey lately?
Man2: nah bro, hes been inside for the past 3 weeks doing methamatics
Man1: damn, hes a hardcore nigguh
The way in which a meth a addict try's to buy product with cash money while they owe money or deliberately attempts to confuse the seller by rapidly talking/throwing numbers around in a frantic manner hoping to benefit them selfs by either shorting the seller money or by receiving extra product.
Buyer: "oh hey, ha how much was it I owe you?.... $50, is it... $60? No no it was $45right? Ya ya $45"
Seller: "nah I don't care for your methematics, you owe me $80 now where's my money man?"