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1)v.- To be a second party on a loan or purchase of material goods, usually resulting in unwanted debt for the cosignee, and a lesson in life about the limits of friendship and one of the pitfalls of same.
I never should've cosigned for that loan, now I have to pay for a car my buddy crashed before he skipped out on the loan.
by cunninglinguist July 02, 2005
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8
A Slang Word Meaning "Vouch", When You Get Someone A Job Where You Work. If The Person Is Working Out Then The "Co-Signer" Usually Takes Credit For The Employee's Success(Behind Their Back Usually).
Justin: "Holy Shit, My's Like The Best Employee We Got, Including Myself, Look All The Work He Did Last Night By Himself!"
Tommy: "Yeah, That's Right I Co-Signed That Kid."
by Ibble February 27, 2005
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10
1.
To instigate

2.
To add in ones opinion or "two cents".
"I did not sleep with your sister... Ralph was only cosigning, its a lie."
by xCOBRA_CLUTCHx March 29, 2004
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11
To allow other people to have sex with a person you have had sex with. Term can range from a hook-up to an ex.
Man do you want her? I co-sign her.

OR

I’m into her. I don’t co-sign anyone fucking her.
by Wackboysouthere July 31, 2018
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