What does it mean if something "slaps"?
Slaps is a slang word originating from the San Francisco Bay Area, popularized by local rapper E-40. Music "slaps" when the music hits hard, the bass pumps just right, and you feel it in your chest. Music that makes you want to get active and dance is music that "slaps".

Food does not ever slap. Food smacks if it is good. It does not ever slap.