A very hard slap. The hand is extended all the way back and then brought forward stricking the face extremly hard and fast, disorienting the victim.
These slaps are Bam Margera's trademark.
Dude-Yo bam slap me.
Dude2-Ok dude. (BAM SLAP)
dude-yo dude that totally hurt but i dont care.
dude-yeah dude.