1.) A round about way of saying 'I just came'; euphemism for having an
orgasm or total arousal
2.) when something really
awesome happens, not necessarily sexual
Usually people say the 'the mail's coming' or 'the mail came', hence, 'fuck the mail', implying you're the one who came instead
What?? Natalie Portman and Mila Kunis do it in
Black Swan?? FUCK THE MAIL.
Oh snap, did you just see that waitress bend over? FUCK THE MAIL.