3rd string on a guitar, and it is the 1st on a bass guitar
"My g string is out of tune."

"Hey babe can you come over and tighten my g string?"
"No I can't because its stuck in my vagina!"

"Do you want to lick my G sting?"
by Fredric S. October 09, 2005

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it could be a short term for"gamma string"."gamma" is known as a letter of the greek alphabet which looks like a "y".this "y" shape looks like this sexy underwear. perhaps, the word"gamma string" was shortened to "g string" because it lacks slanguistic taste.
Damn it!she looks sexy on that g string.
by Jay shay December 17, 2005

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The lowest sounding string on a violin.The center of many inside jokes in a high school strings class.
"Teacher!I'm plucking my G-String!"
by FuuuuuuuunyFucker May 06, 2009

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The third string on a standard six or seven string guitar.
Guy 1: Man I saw this girl wearing nothing but a g string.
Guy 2: What the fuck, dude?
by Fuckyourmother December 31, 2005

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another term used for "BUTT-FLOSS"
The g string is a piece of clothing that is shoved/suffacated inbetween ass cheeks.
by boogah March 20, 2006

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The first lowest string on a violin
The second lowest string on a viola
The second lowest string on a cello
The first highest string on a double bass
and a type of wedgie panties
Sarah: Man... my peg for my g string keeps slipping I hate it
Emily: What you have a peg on your underwear?
Sarah: No... Not that type of g string!
by bobkielviol March 12, 2009

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The fourth string on a guitar or bass.
Jeff strummed the G String on his guitar.
by Frenchmansmell March 14, 2015

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