An outrageously powerful slap delivered into the ear by the inside of one's bare palm. A loud slap is heard from across the room and the victim is usually left temporarily deaf, hence the name. The slap is preferably delivered after administering a droplet of spit into the palm and without the victim seeing it coming. It can be used as a verb in all tenses.
Noun: Ron Artest just gave that fan a mean deafazz.
Verb: Keep talking that smack and you'll get deafazzed.
Urdu word used by desi ppl belonging to pakistan and india. Usually used in retalliation when someone says something lame, offending, hurtful, or just plain bogus.