A combination of the words "choice" and "bonus." Circa 1983, Beta Theta Pi fraternity, UCLA. For example, "choice + bonus = chonus" as scrawled on a bathroom wall in the fraternity house.
by ZippyZoppy January 13, 2010
a chonu is a word used to describe a mysterious lost person, someone that has had things happen in his/her life that have ended up ruining it.
by kerslick January 30, 2009
by Zach Slater November 29, 2007