Definitions by mochaXX16

koser 

an acronym used in fighting or survival games, mostly in roblox, to describe someone who ‘kills on sight’ or kills anything it sees. most of these people are really toxic.

player: “HEY STOP KILLING ME YOU KOSER”
koser: “L BOZO GET BETTER AT THE GAME”

koser by mochaXX16 January 14, 2024