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1. pew pew
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!"
2. pew pew
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!!!!!
3. pew pew
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."
4. Pew Pew
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
5. Pew Pew
a sound made by guns or stupid japanese anime gunfires. Used to taunt people. Extremely annoying for many people. Used by noobs.
Michael is a PEW PEW

PEWPEWPEWPEWPEWPEWPEWPEW!!!
WHEE PEW PEWWWWW
6. pew pew
An interjection used to signal the presence of a good looking female.
Stems from the sound a robot makes after seeing a hot fem-bot. It is caused by his insides disintegrating (from the uber-sexiness, of course). The pew sound can be imagined as a nut/bolt hitting the inside of his outer casing, similar to the sound made by a ricocheting bullet.
Your sexiness makes my robot parts go pew pew pew

*spots hot girl*
pew pew!
*friends look and stare*
7. Pew Pew
Noun

1. Sound made by energy weaponry (especially lasers) or rapid gunfire
2. Combat involving such weapons

Verb

1. To attack with lasers, automatic gunfire or similar weapons
2. To completely defeat an opponent (usually in computer games)
Star Wars had some decent pew pew in it.

Klingons pew pew first and ask questions later

I pew pewed that guy so hard at Starcraft 2