This word is a simple shortening of the term "carburetor" used by marijuana smokers to refer to the carburetors on thier pipes. Generally these carbs occur on handblown glass pipes, or smaller wooden or metal pipes. The idea behind the carb is to cool the smoke by allowing fresh air in to mix with the smoke in the chamber. This results in smoother hits, and less coughing.

Another common term used for carburetor is rush.
Bill scrapes the resin out of his pipe through the Carb hole.
by Dilcue October 23, 2004
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short term for "(not) Care", "I don't give a shit." Often used as an expression.
"I had such a wonderful trip to Boston!"
"Carb."

"I really carb about the F's on my report card: I'm already accepted into the college I wanna go to."
by BC>Bosco September 14, 2008
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To force feed someone carbohydrates in large quantities.
Dan was on the Paleo diet, and so I tied him down and carbed him until he puked
by DGGG January 14, 2013
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The process of letting air into a bong.
Dude Pull out the bowl, the chamber is full! Its called carbing!
by ZAssMaster July 17, 2009
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a drunkin achoholic guy who hates his life.
drunkin ginny carbs.....a passive aggressive comedian
by trone89 April 16, 2011
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To be excessively linked to websites while chatting, or texting. No chatting, just endless links.
I was IMing with J, he never speaks, just endlessly carbing me.

What's up with all the carbing dude, can't you say hi?
by ctden666 March 13, 2009
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(n) A friend that makes your life a living hell in any video game you play. In Minecraft, he will blow shit up. In clash royale, he will not hesitate to use elixir golem. In any FPS, he will make sure he kills you and you only. In mario kart, he's the type of dude to intentionally start the race in last place, get a star, and when he's behind you, use it, and stay on you so you cannot play the game. He will also be in last place, but Carb does not care, as he made your experience playing the game objectively worst, which to him is just as good as getting laid.
"Bro did you just blow our entire team up for the hell of it?"
"Yeah, why?"
"That's a carb move."
"A what?"
"Nevermind."
by llqmq November 9, 2021
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