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
Get the C:\con\con mug.
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
Get the cons mug.
An Opiate
Usually refferring to Oxycontin
The guy in apartment 3c dabbles in cons.
by weegee July 24, 2005
Get the con mug.
short for congratulations. to not give a shit about something at all. sarcastic. to disregard someones statement rudely and not care at all.
hey man, i got an A on my math test!

oh really? CON!
by richard coswald May 5, 2010
Get the con mug.
slang term meaning "chronic" or marjiuana
"i need to grab some con yo"
by Elle A July 19, 2003
Get the con mug.
it means to woo a chic,or better said to convince a chic 2 fall in love wit u.
jack wants to con kate so that he could fuck her.
by J-shay September 11, 2005
Get the con mug.
short for concur and concurred
Post 1: I like rice.
Post 2: con
by bob May 26, 2004
Get the con mug.