cheerleading or co-signing 

Giving your opinion when your not part of the conversion. ....when its neither wanted nor needed.

The guy piped up from the peanut gallery with some shit that had nothing to do with what we were taking about, then someone shouted "hey fucko, we don't need any cheerleading or co-signing! "

cheerleading or co-signing by Wooderbone March 28, 2017

Co-signin 

mean you are agreein with everything he/she says just so he/she would like u
also known as
dick-rydin
dick-eatah
on his head

Damn She Stay Co-Signin off that nigga and he still dont want her.

Co-signin by Da Gurl Reppin Philly November 30, 2003

cosigning 

Cosigning when someone is making fun of someone else and YOU join in. Thats Cosigning

Don't be cosinging on what he saids.

cosigning by Tyson (T-Mack) August 3, 2005

Cosignlingus 

When you read a post so reprehensible you feel compelled to block every single person who agreed or cosigned it.

In the recent era of in your face racism, fascism and anti-semitism, such a word was needed to explain how dirty one can feel reading White Nationalist and White supremacist literature and the urge to block anything or anyone associated with it. I call it #TrumpEraEnglish.

After reading an White Nationalist Facebook post denouncing the Holocaust, I engaged in an orgy of cosignlingus feeling completely filthy that some people I called friend were among them.

Cosignlingus by AFailureToCommunicate November 22, 2016