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1.
1. Sound made by lasers, usually related to star wars.

2. Owning a person, usually related to world of warcraft
"wow those lasers sounded like pew pew on the surround sound"

"dude you just pew pew his ass down!"
by Aoshi May 28, 2006
 
2.
A noise that laser beams makes
OMFgzzzLAZORrrBEAMzzzPEWPeW lol bbqpwned
by Jaqq June 17, 2006
 
3.
A phrase said along with accompanying gesture (both hands pointing to each other miming rapid gunfire) after something extremely awkward has occurred. A more up-to-date version of the infamous awkward turtle.
Kevin: Dude, why is there chocolate all over my leg?
Charlie: Um, that's not chocolate...
Scott: PEW PEW!!!!!
by scubasteve90 July 10, 2010
 
4.
In EVE Online, a phrase primarily used to refer to player versus player combat.
"Dude, let's head down the pipe and get some pew pew."
by Ayari May 25, 2007
 
5.
Is a term people use to demeaning'ly describe the use of silly and often worthless pieces of energy based weaponry.

The Term "Pew pew" is mentioned when an energy weapon such as laser and/or plasma based weapon in movies or games are used by the owner that admittedly confirms lack of confidence of its firepower.

The reason for this term to be used by the possessor of a energy based weapon is mostly due to the seemingly low accuracy and pathetic firepower that cannot intentionally hit its target. This is mostly due to the fact that people who tend to wield energy based weaponry are in one of the following situations:

a) the weapon lacks iron sights or any other means to aim

b) think its cool to be gangsta and shoot from the hip in a pose commonly referred to as "the chimp"

c) have inherent bad vision due to burned retina after too many flashy fire fights.

d) think its cool to see flashy lights and miss intentionally to keep the fight going.

And even in the awkward event of if it actually hitting the target, it sustain next to no damage which then makes the exchange of flashy projectiles and beams continue for an absurdly long time.
Due to the lack of accuracy fire fights with such weapons are often long and tedious as the combatant take take their time to enjoy the flashy lights and pretty colors and mention the words "pew pew" in a high pitch voice to simulate the sound of the weapon in a relaxed manner.
by Fishbus October 21, 2012
 
6.
1. Sound imitating an energy weapon firing.

2. MMO slang for DPS
1. "Pew pew!" went his laser, and the guards fell dead.

2. Moar pew pew on my target plz
by Belgarion89 October 27, 2011
 
7.
Two or more sound effects mimicing the sound of a gun firing, sometimes made in conjunction with turning your hand into a gun. These can be loud or soft, depending on the size of the gun in question.
I'm a cowboy! Pew-Pew!
by Steph Dybastion-Scott April 13, 2011