A phrase coined by the UFC's Tony Ferguson, meaning "Champ Shit Only." Implying that he is the true UFC Lightweight champion of the world.
"Where you at McNuggets, you fucking piece of shit, I'm gonna kick your ass! You better come and defend that belt, defend or vacate motherfucker! CSO motherfucker!"
by meatspin.fr May 05, 2020

Community Service Officer.
University Employees that provide Escorts and Campus Security. They are often underpaid, overworked and stalked by their clientel.
University Employees that provide Escorts and Campus Security. They are often underpaid, overworked and stalked by their clientel.
by suptrupe December 28, 2005

by MannyFresh September 22, 2005

by SamBeeGees November 09, 2009

Complicated Significant Other, for example being friends with someone who rejected you but he's still kinda flirty, etc. There's no other name for your relationship. Can only be used when you're single and he's your or one of your closest things to boyfriend, lover, etc.
by cupcakes3659 December 11, 2016

Combined Sewage Event: typically used by public works departments to describe the unintended discharge of large quantities of raw sewage into lakes and oceans. CSO can also be effectively applied to the uncontrollable discharge of large quantities of excrement by an individual.
by THX1137 July 13, 2010

by Desi_Doubkle January 03, 2008
