Slap is an alternative word for cool, awesome or radical
I had a 'SLAP' time last weekend, That food was 'SLAP'
Example 1:
Girl: hey, wanna go out tomorrow?
Guy: what time?
Girl: 5:30?
Guy: that slaps
Example 2:
Friend 1: meet at the park later?
Friend 2: yeh slap
when you hit someone with the palm of your hand, usually to the face
ow fucker why did you slap me like that
When music is really good
This track slaps the rubber pants off the lab rats!
When a food item is better than expected/the best ever.
Yo, your grandmas mac'n'cheese slaps.