Definition of rat in

Also known as slop. To pocket a ball by luck; "he ratted in the 9 ball"; usually employed disapprovingly.

24 Random Essential Billiards Terms

This is a ball that is positioned near your pocket that can be used to kiss off of when sinking another object ball.
This is an imaginary line that separates the halves of the table by crossing at the middle of the side of pockets.
This is a shot in one pocket pool where you simple aim at a cluster of balls near your opponents pocket to attempt to make something good happen out of desperation because other shots are not feasible.
Same as suit, predominantly in British terminology, i.e., in eight-ball either of the set of seven balls (reds or yellows) that must be cleared before potting the black. Generally used in the generic, especially in rulesets or articles, rather than colloquially by players.
In certain carom billiards games, any shot in which the cue ball is sucessfully caromed off an object ball to strike another object ball (with or without contacting cushions in the interim) is a considered a billiards shot.
In snooker, a situation where the scores are tied after all the balls have been potted, and the black ball is re-spotted and the first player to pot it wins. The players toss for the first shot, which must be taken with the cue ball in the D. A safety battle typically ensues, until an error allows a player to pot the black, or a fluke or a difficult pot is made.
Also pills, tally balls and shake balls. Small, round markers typically numbered 1 through 15 or 16, which are placed in a bottle for various random assignment purposes, such as in a tournament roster, to assign order of play in a multiplayer game, or to assign particular balls to players in games such as kelly pool.
Chiefly British: Short for side spin. In Canadian usage, the term is sometimes used as a verb, "to side".
American Cuemakers Association. This organization was formed in 1992 to help bring value to the development and advancement of cues in the United states.
When the cue ball is tucked behind the corner of a pocket, therefore not allowing a direct shot at the object ball.
Used when describing perfect cue ball position play.
This is English that turns into reverse English after contact with the object ball. This will close up the angle on a bank.
"Pocket billiards," or a game in which balls are shot into pockets.
This refers to a shot that travels on a shallower path due to the english placed on it. This is to come up on the near side of a pocket on a bank shot.
A joint type which makes it possible to screw and unscrew the butt and shaft very quickly; faster than standard threads.
When a player is playing flawlessly, just "cannot miss" and the game seems effortless.
A form of Carom billiards for the masters of the game. Played the same way with two cue balls and a single object ball. Except, in between hitting the opponent's cue ball and the object ball your cue ball must bounce off of three rails (this game is played with an unpocketed specially sized table).
When two or more object balls are frozen or nearly frozen, such that cue-ball contact with one object ball, without the necessity of great accuracy, will almost certainly pocket an intended object ball in the cluster. The most common form of dead arrangements are the dead combination or dead combo (a combination shot in which contact with the first object ball will pocket another one), and the dead kiss, in which contact with the first object ball will pocket it off of another one. See also wired.
Also treble. A British term for a type of bank shot in which the object ball is potted off two cushions, especially by sending it twice across the table and into a side pocket. Also called a two-cushion double.
Same as duck. Derives from an easily shot ball "hanging" in the pocket.
This is a long distance shot that is given to your opponent as a challenge to make because it often works well as a safety (defense) when a better one is not available.
Nickname for the nine ball, usually only used when playing the game 9-Ball.
This a shot that hits the object ball at the nine ball to see if you can get lucky by sinking the nine ball in any pocket. (also see Cheese the Nine and Rolling the Cheese).
Oceania Pocket Billiard Association.