Short for janitor. In internet forums and imageboards, referred to users who are tasked with maintaining the quality of posts, such as cleaning up spam. Usually has less authority than a moderator.
He's a janny on an anime imageboard.
He does it for free.
A player who's extremely bad at a game and/or lacking the skill set to make his team succeed. Seen in competitive games such as CS:GO, League of Legends, Rainbow Six: Siege, Overwatch etc.
Commonly used in 4chan's /v/ and /vg/ boards.
I solo queued csgo yesterday but we lost because of a dumb shitter on our team who went 0-0-12.