Gnar: Short for Gnarbage. Gnarbage is a failed experimental concept put forth by Riot games. Upon release Gnarbage generated much outrage and backlash among the League of Legends community.
Crippled by a very strict and predictable build path, weak base damage and defenses, an ultimate that is only activateable situationally, and a shallow and annoying personality the initial release of this champion was a disaster. Riot would attempt to balance Gnarbage on multiple occasions but it would end in futility as Gnarbage just cannot be balanced due to numerous errors in his design.
Riot has ultimately given up on the Gnarbage experiment and have given him the Yorick treatment hoping that by ignoring him long enough he will cease to exist.