The fixation or propensity to beat your food before or during eating it.
Sarah: Hey Marty I brought you home a cheeseburger.

Marty: Oh, I bet it’s been a VERY VERY BAD burger!

While engaging is sado-mastication, Marty proceeds to pimp slap and punch the helpless cheeseburger before taking a bite and then makes sounds of delight, achieving some sort of sick thrill from this!
by donkey shave January 30, 2010
Get the sado-mastication mug.