a shoutout to show exceptance, agreement, and to give props. usually followed by to high fives.
friend: "jay is stupid, i'm going to beat him up".
me: "you're right, give me some pah-pow".
uttered upon total pwnage, or used as an exclaimation of accomplishment.
Did you guys see me smoke that nub? Pah-Pow!
or
Man i just worked that exam over... PAH-POW!