master quiche Share definition Flag To take a dump in someone's microwave and turn it on. Usually done at the victim's house while he's passed out. "That guy stiffed me $20, but it's ok, I left a master quiche in his microwave" master quiche by herrsquidward January 13, 2008 0 0 Get merch Get the master quiche mug. Buy Now — $32.95 See more merch