What's the meaning of "slap me five"? Any difference between "slap me five" and "give me five"?
There is a book called Slap Me Five.
The difference is only one of expression and context, not meaning. "Slap" me five is a funkier way of saying "give me five" or "give me some skin" or any of several ways of asking for a hand slap/slide.
Slap me five, 'gimmie five, and give me some skin were all synonymous greetings akin to a handshake, but with the palm up by the initiator.