Conc meaning Conccusion grenade. Used in TFC ( Team Fortress Classic ) A halflife multiplayer mod.

Usually used for " Conc Jumping " Conc make somewhat of a forcefield and pushes the user in directions according where there standing
See if you can conc over that bridge.
by Pyro-Whore August 19, 2006
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Short name for concussion jumping, or, using concussion grenades to perform trickjumps in the half-life mod, Team Fortress Classic. Started out with easy crap such as concmap_r, and now there are maps that are so fucking huge, you would go insane trying them.
"Who's up for some concing on concmap_cze_r?"
by Sam August 6, 2004
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Originated in chemistry while learning about concentrations.

1. Solid, concrete
2. Pwn
3. Concentration
1. Dude that shit's conc!
2. He totally just conced you.
3. -insert chem mumbo jumbo-
by unidentifiedmen December 6, 2007
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Someone that is explicitly bad at everything they do and say in life, especially if their name starts with anything from A-C.
You're such a God-damn Conc step-bro.
Why are you being such a filthy Conc you cheeseburger lover.
by Cayk Smow April 23, 2019
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It literally means fucking nothing. Other than to express someone's feelings whenever, wherever, however.

Specifically used in online conversations as it has no known pronunciation
Man 1: "Dude I just got mad coochie last night"

Man 2: "conc !!!!!!!!"
by KauvBallen January 10, 2022
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This trip would've been a lot better if we brought some concs. My hand is getting tired.
by danlikesbikes April 5, 2007
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A state of being under the influence by a drug; getting "concked". Synonym: high, boofed, gone.
-Bro, imagine me on conc..
-Bro..
by Bigpep121 March 8, 2019
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