The act of hauling ass on your skateboard and slapping it into a curb at an angle that gets you on top of it and grinding. There are many variations but a true slappy involves speed and grinding...John Lucero, Ricky Winsor, Natas Kaupas and many others are known slappy legends.
Dude..go grab a twelve pack and we'll do slappys on that red curb.
A slpppycake occurs when you blow your load in your hand then slap your partner in the face.
I knew she was about to reach orgasm, as was I. She was so turned on, I pulled out, shot my wad in my hand, and gave her a slappycake. She came immediately...