slappa Share definition Flag In which a person is called a slappa, because they have slept with multiple people. A slappa is pretty much the same as a slut, but more insulting. Nina: I had sex with 2 guys last night. Steve: Thats cause your a SLAPPA! slappa by Hoppers April 19, 2008 0 0 Get merch Get the slappa mug. Buy Now — $32.95 See more merch