look up any word, like cum:
 
1.
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
 
2.
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 06, 2007
 
3.
Short for concubines.
This trip would've been a lot better if we brought some concs. My hand is getting tired.
by danlikesbikes April 04, 2007