look up any word, like darude - sandstorm:
 
1.
a punch in the face.
a blow to the grill.
Yo son when he hit him in da grill it was like pi-yow!!!!!
by keith durant January 26, 2005
 
2.
a word said in extreme excitement or 2 either represent a hard punch,poot,or if u step in a big puddle nd splash on someone
lex-piyow!! (steps in large punndle)

random guy walkin by-dnt do tht shit again lil nigga!
by R.B.A March 05, 2008