To hit your grandfather in the face with your jewels. ;)
I just did a slappy pappy and he grounded me for two weeks! I don't think he gets the joke!
by kyleBUTT August 07, 2008
To slap a girl across the face with your well endowed johnson
Hey... She is into the rough stuff! She likes me to give her the "slappy Pappy"
by El Donko Deluxo June 27, 2003