When you punch someone right in their face and they get a concussion.
Mike did you see that asshole over there?

I'm gonna give the fucker a conc city.
by TheCaffeinator November 24, 2014
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Leader of all concubines and provider of the greatest sex ever.
Osama needed his King Conc for sexual relief from his stress.
by conc000 October 25, 2011
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to pull a conc means to have sex with a girl but pull out just before you cum and blow ur load into your hand, then throw the cum at the girl. usually done when having sex with someone very attractive but very very annoying.
guy:i met the most annoying girl at the bar last night, but she was hot so i went back to hers, pulled a conc and bailed
other guy: ahhh thats ace, i wanna pull a conc just to see what happens
by el noodle January 13, 2008
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A conc is very similar to a zoot or a boof. In essence it is a spliff of weed, Low grade usually this term is very popular in Cambridge but not used much elsewhere.
A Cambridge boy:Hey man I’m going down on Sunday to smoke a conc
Literally anyone else: a what?
A Cambridge boy: a CONC MAN, it means a large spliff weed
by CONCman October 30, 2019
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someone with a large forehead on the body of a rectangle,

commonly found on the 9gag website.
Stop being such a cong can (conc), you need to exercise!
by cong can vu May 22, 2017
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