Are you going to enter the upcoming StarCraft 2 tourney?
|STT||Single table tournament|
|ATW||All the way|
|ESL||Electronic Sports League|
|GSTL||Global StarCraft Team League|
|WCS||StarCraft II World Championship Series|
|WSOP||World Series of Poker|
|Bracketology||Predicting who will win a tournament|
|March Madness||NCAA Basketball Tournament|
|Sweet Sixteen||Last 16 teams in a tournament|
Players, fans, and commentators may refer to a tournament as a tourney. This abbreviation caught on because a) tournament is a long word and b) tourney is fun to say.
A tournament, of course, is a series of competitions between athletes or other challengers competing for a prize. Tourney can be used to refer to any type of tournament, including sports tournaments (such as the NCAA's March Madness), online gaming tournaments, and even spelling bees.
In ye olden days, tourney was also used as a verb, which meant "to compete in a tournament." While almost no one uses tourney this way anymore, more people definitely should. (So please start doing so immediately.)