When you're a tween stuck with your family in Disneyland in Cars Land and you seriously need to nut, so you stick your meaty-ass, prepubescent dick inside Mater's rusty old exhaust pipe, and he makes nut so fast that your mum almost doesn't catch you with your dick out in Disneyland.
John had a Mater Nut in last summer in Disneyland. He said it was the perfect nut.
An acronym: Dick rotting on steak knife. A multi-purpose word which portrays the true condition of man.
Man, I was taking a shit, and my foot started cramping; we are D.R.O.S.K..