He 'walks a/the razor edge' [='walks a/the fine line'] between humor and bad taste in his comedy.
A glass of milk will 'take the edge off' your hunger/appetite. [=will make you feel less hungry]
a company that is at/on the 'leading edge' [='cutting edge'] of new developments in technology
(..) - Aah! - All right. Nobody move. I got a dragon here, and I'm not afraid to use it. - - I'm a donkey on the edge! - - Celebrity marriages. They never last, do they? Go ahead, Shrek. (..)2001 Shrek