A charming gem of a man. A great guy with a heart of gold who's always there for you. A real mensch. 2.) Cockney slang. He puts on a guise, a kind of mummer or traveling player. A play on the word "guiser".
A tough guy or dangerous man. This goes back to the days of Gunsmoke, hayseeds, John Waynes and wild west saloons. Back when curly wolves were "reckoned with" instead of shot at by some punk with mommy and daddy issues.