Slap or SLAP is an acronym for sounds like a plan. This is a way of expressing one's desire and confirmation to doing something. This acronym is incredibly useful as it can also be expressed simply by slaping someone five!
Maeve: Hey Daniel can you please keep me amused with your bad but hilarious jokes for the rest of my life?
Daniel: SLAP!
The precursor of the phrase "Yo ass cheeks"
There are no other uses of the word slap, but it is said to mean "To swiftly swipe your hand over something in a sexual manner.