1. slang Damn. Primarily heard in UK. Well, blow me… I can't believe you got an A on that impossible test!
2. vulgar slang Although the phrase specifically refers to a request to perform fellatio, it is typically used as an expression of frustration, like "screw you" or "go to hell." A: "Did you seriously strike out every time you went up to bat?" B: "Blow me, OK?"