a short form of "constitutional convention" defined in Article V of the U.S. Constitution which allows the states to convene a convention to propose amendments to the Constitution.
If 2/3rds of the States approve a constitutional amendment in a con-con then it would become an amendment to the Constitution if 3/4 of the States vote in favor of it.

A con-con is the only way to stop rampant, rabid and rapacious corruption in Congress. Congress will only vote to pass a law that benefits Congress. A con-con can stop the voracious appetite members of Congress have to make themselves wealthy at the expense of the people.
Man, a con-con sounds like a great idea. It could overturn Citizens United and give the people a fair, balanced health insurance reform bill that will stop the new IRS insurance revenue service in its tracks.

The only way to fix our broken U.S. government is with a con-con.
by euphemismo April 11, 2010
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A bug on old Windows computers that coincidentally, when typed into the run dialog box, and then running, would blue screen the computer. It was never patched. Pretty normal for an old Windows OS, but it's a good way to prank your friends.
C:\con\con can often be used as a prank like this:

Suki: So, you type C comma backward slash con backward slash (C:\concon) and then hit enter, alright?
Hikaru: Yes, what happens when I hit enter?
Suki: Something happens!
*Hikaru hits Enter.
*The computer bluescreens, causing Suki to laugh.
by Surono419CH May 22, 2019
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any shoe made by the converse brand which include but is not limited to chuck taylor all stars chucks
"hey i just got a new pair of cons"
"oh man thats great i love cons"
by rileyz September 3, 2006
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Con may seem crazy and weird. But con can make your world just that bit more wild, in a good way. Con will take your breath away because you can’t stop laughing. They are resourceful, nerdy and can be hard headed. They can be anxious depressed and tired often, but you won’t know about it as they try right or hide it. Sometimes you need to remind them, it’s okay. If you have a Con keep the mind around. They are worth it.
Con, you need to stop or amma die of life laugter!
by TheGentGMOD October 8, 2019
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Con- The prefix to the five Con Words. They are as follows:

1. (Con)Dom
2. (Con)Sume
3. (Con)Sole
4. (Con)Ner
5. (Con)Crete
Exp 1. Hey Ty, can I borrow some Cons
2. The Shady Bunch have consuuuuumed the Brown Town Legends, leaving Broz a skank-right hood rat
3. Yo Banks whats up with your jank Con?
4. This honky James Con ain't doing shit this week
5. Lets hit up TDs for some Cons
by Hoss171717 December 29, 2021
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Could be used as a short for Condom or a guys name Constantinos. Con is a rebel, he may be interested in stuff like drinking and smoking, a lot of girl like him and he has some sexy hair!
girl: omgg is that con?
girl 2: back of shishtar his mine!
girl 3: I LOVE UR SEXY CURLS!!
me: pls date mee!
by Katechkalovessaambody June 14, 2018
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Con (verb) /kōōn/ like (cone)long vowel 'O' . From Modern Language referring to Convfefe after President Trump Tweet, its meaning is unknown but has been widely used as a criticism and or flourish meaning crazy. Not to be confused with con ( verb) meaning to persuade deceptively.
Your a con!
This shit is con!
by CosmicIX October 11, 2019
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