Mog Rat Share definition Flag A fine piece of Gypsy terminology referring to someone/anyone who doesn't agree with what they just said/did/were about to do. Man: "Please don't stab my child" Gypsy: "Fuck off, Mog Rat" Child: "Ouch" Mog Rat by YourAcquaintance September 30, 2009 0 0 Get merch Get the Mog Rat mug. Buy Now — $32.95 See more merch