An open-palmed strike, usually directed to one's face.
Contrary to punching, a slap is mostly used to punish, wake up, stimulate or humiliate rather than harm another person. This is why it is mostly used by girlfriends, sergeants, bosses, bdsm partners, parents and teachers.
Very common in certain cultures, like Japan.
The following tags are aliased to this tag: slap (learn more).