look up any word, like cleveland steamer:
 
2.
The sound made when shooting an imaginary weapon.
omgkittensmewmewmew!! Get them! PEWPEWPEW!!

Commonly used when referring to the likely hood of kicking butt in World of Warcraft.
by Clint Payton January 11, 2006
 
1.
interj.
1. Used to imitate the sound made by firing a gun; specifically a laser gun (esp. a Stormtrooper rifle).
OMG LAZER GUNZ PEW PEW PEW!!!
by LaunchOverIt August 03, 2005
 
3.
Blasting of a cunt Nugget.
I went pew pew pew at the nugget.
by lezbhonest1329 April 28, 2011