(US LAW) nonprofit corporation; legal status permitted to certain types of organizations under Treasury Regulations section 501(c)(3) that exempts it from taxation.

The 501(c)(3) is quite easy to organize, especially if one wants to funnel money from donors to some form of activism. It was first made available in 1934 but has become extremely common since 1986 because successive rulings greatly loosened restrictions on electioneering for 501(c)(3) entities.

Often 501(c)(3) entities engaged in politics are affiliated with an almost-identical 501(c)(4) entity, which has EVEN WEAKER limitations on electioneering.
The 501(c)(3) clause in the IRS code is practically an invitation by the government to launder corporate profits into lobbying.
by Sorry, the good guys lost September 10, 2010
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The 3 things a girlfriend needs to do in order to keep her man happy Cook, Clean, and Choke on his dick.
Any bitch I talk to got to have the 3 C's or her ass is getting the boot.
by Keep em in line December 26, 2015
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The applied math concept of average length of male genitalia. The integer "c" is abbreviated from "cock". Three being the length (in inches).

For e.g. cock is three inches or c=3
My math teachee taught us sex education, and explained private parts through formulas such as c=3.
by Dillon Schneider April 13, 2023
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A sexually sent emoji composing of multiple symbols by text or other means representing that of the male genitalia or penis. Often sent by someone online either as a troll of sorts or representation of sexual desire.

Or it's when someone online just had a stroke.
Situation 1:
A: c=====3
B: Ew why the hell would you send me that it's not funny
Situation 2:
A: Hey, what do you want to do?
B: {} <------ c=====3
Situation 3:
A: c=====3
B: Holy shit someone's having a stroke
C: Call a fucking ambulance
by Generic_Name idk August 2, 2022
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C+M is a GREAT couple that REALLY LOVE EACHOTHER they are happy and love eachother.
CJ and Mal are such a good couple i wish i was like them C+M=<3.
by dadondaddy February 21, 2022
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