Rat Share definition Flag someone who's good for nothing, always drunk or high, has a vape, and is usually the one who always wants to be high/ intoxicated. Ryan’s in the bathroom vaping, what a rat. All Emily wants to do is get high she’s such a rat. Rat by A rat May 11, 2019 0 0 Get merch Get the Rat mug. Buy Now — $32.95 See more merch