Severed arm of the law Share definition Flag A rogue cop, who has carried on following a case, despite being taken off of it. See Dirty Harry. 'I got a severed arm of the law after me.' 'Ha! You got no chance!' Severed arm of the law by Stephen W. Thomas May 13, 2005 0 0 Get merch Get the Severed arm of the law mug. Buy Now — $32.95 See more merch