behavior-critic Share definition Flag Someone who is always a critic on how other people act and behave, no matter if the criticism is bad or good. Person 1 - "All you do is breathe." Person 2 - "Stop being a behavior-critic" behavior-critic by zman4593 June 19, 2016 0 0 Get merch Get the behavior-critic mug. Buy Now — $32.95 See more merch