Ga is merely an acronym for "go ahead." This word was invented when an Indubitably Splendid Individual started typing a message on MSN, but then the idiot that the Indubitably Splendid Individual (who will remain nameless) was talking to started to type a message at the same time, which was incredibly annoying.

So the idiot and the Indubitably Splendid Individual co-devised a plan to allow each other to talk ONE AT A TIME LIKE CLASSY PEOPLE TALK!! So when either one of these individuals noticed that the other person was typing a message at the same time as them, they simply typed "ga," a polite way to allow the other person to speak first.
Indubitably Splendid Individual: (unsent message) "I hate healthy cereal" (typed whilst the idiot typed the following message at the same time)

Idiot: (unsent message) "WOW did you know that I have 11 1/2 toes?" (Then the idiot says to himself, "whoops it appears that the Indubitably Splendid Idividual is typing a message, and hers is obviously more important than my subject of interest." Then the Idiot erases his message and instead types the following)

Idiot: "ga"

Indubitably Splendid Individual: "Don't call me gay."

Idiot: "No no I said ga, it means go ahead...type your message."

Indubitably Splendid Individual: "Oh ok. Hey, I hate healthy cereal."

Idiot: "Me too but this conversation is so long so I'm going to ga and leave."
by IndubitablySplendid101 September 22, 2010
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When someone does something to either mean harm, roast, or just casually make fun of someone
John: “Emily dumped me bro”
Tyler: “That’s gas
by TookewlForSchewl March 1, 2018
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Grey's Anatomy; A popular television show revolving around the surgery wing of Seattle Grey's Hospital.
Did you watch GA the other night? It was intense.
by melsi28 May 4, 2007
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Gas = Give A Shit
I Don't Gas - I dont give a shit
DUKE: yo dude, my girlfriend just broke up with me man,
N0AH: Yo man, does it look like i GAS?
by AznHitman September 28, 2007
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Anacronym for 'give a shit' as in 'I don't give a shit'
"Would you like some double glazing"
"how about GAS"

"Did you get the shopping dear?"
"No, I GASSED it"
by Hosk October 6, 2003
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verb: to gas someone.

When a prisoner throws some kind of bodily fluid on a guard. They could throw fecal matter, pee, sperm, or blood on someone. This is called "gassing" someone.

noun: ALSO Someone's trying to tell you they have to fart. "They have gas."
verb: Prisoner throwing bodily fluid on a guard.

Prisoner: "I'm going to help you"
Guard: "and just how is that? How?"
Prisoner: "Prisoner 8672 is going to try and gas you tonight."
Guard: "Thanks for the tip. I'll watch out through the vents where they usually throw it."
by NotEcoliEcoli April 27, 2011
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