Definition of Jail

A pool table where two shims have been placed on the sides of each pocket (in the jaws beneath the cloth), making the pockets "tighter" (smaller). Such tables are "tougher" than unshimmed or single-shimmed tables.

A ball hanging over the edge of a pocket.

See overcut.

Also known as joint caps. Plugs that screw into/onto the threads of a joint when a two-piece cue is broken down to keep foreign objects and moisture from contacting the joint mechanism.

This is a bank shot that goes off of the head rail and then straight to the pocket at the other end of the table.

A tournament format in which each contestant plays each of the other contestants at least once. In typical league team play, round robin format means that each member of the home team plays each member of the visiting team once. This format is used by BCAPL, VNEA and many other leagues.

A cue made specificaly for an individual player. The term may also describe a quality product of a low volume yielding cue maker who puts more time and effort into both the design and structural integrity of the cue stick, as opposed to a cue manufacturer that builds their cues in a more assembly line fashion.

To intentionally miss a shot (that results in a foul) in order to create a position for the cue ball that makes it hard for the other player to execute their shot. Not to be confused with a "Safety", since a safety is a legal hit.

The Billiards World Cup Association. The Billiards World Cup Association (BWA) was a governing body for carom billiards, like its competitor and successor, Union Mondiale de Billard. After staging several three-cushion billiards championships, BWA met its demise in 2004 due to financial problems and failing relations with the UMB, leaving the latter as the only carom governing body.

To create contact with the cue ball or an object ball.

The first shot in a game - aimed at a set of racked balls.
To execute the first shot in a new game.
In snooker this term can be use to indicate a series of successive shots completed by a single player.

Also lows, low, low ones. In eight-ball, to be shooting the solid suit (group) of balls (1 through 7); "you're low, remember", "you're low balls" or "I've got the lows." Compare solids, reds, little, spots, dots, unders; contrast high.

An agreement between two players in a tournament, one of whom will advance to a guaranteed money prize if the match is won, to give a certain percentage of that money to the loser of the match. Also known as a saver.

A line, sometimes imaginary (especially in American pool), sometimes drawn on the cloth, that runs horizontally across the table from the second diamond (from the head rail) on one long rail to the corresponding second diamond on the other long rail. In most pool games, the opening break shot must be performed with the center (base) of the cue ball behind the head string (i.e. between the head string and head rail). The head string intersects the long string at the head spot, and delimits the kitchen (and, in European nine-ball, the outer boundary of the break box). The head string's position is always determined by the diamonds, in contrast to the similar but different baulk line, the position of which is determined by measurement from the bottom cushion (head cushion).

The European Pocket Billard Federation is the European governing body for pocket billiards. EPBF is also one of the member organization of the WPA (World Pool Billard Association)

This is the white ball in carom games which is separated from the clear ball by a marking (usually a dot or spot).

The Valley National 8-Ball League Association. Founded in 1979, VENA is a non-profit organization established to promote the game of pool on coin-operated equipment. The membership is comprised of men, women and junior players, coin machine operators and manufacturers.

Term for object balls in the game of Chicago that are each assigned as having a set money value; typically the 5, 8, 10, 13 and 15. In games where multiple balls must be pocketed in succession to score a point, such as cribbage pool or thirty-ball, when the last ball necessary to score has been potted, the points given is referred to as a way.

Also littles, little ones, little balls. In eight-ball, to be shooting the solid suit (group) of balls (1 through 7); "you're little, remember", "you're the little balls" or "I've got the littles". Compare small, solids, reds, low, spots, dots, unders; contrast big.

Also simply maximum. In snooker, the highest break attainable with the balls that are racked; usually 147 points starting by potting fifteen reds, in combination with blacks, and clearing the colours. Also called a 147 (one-four-seven). In six-red snooker, the maximum break is only 75 points, due to fewer red balls and thus fewer black-scoring opportunities.

This is the portion of the cue you would be holding if there was no wrap or grip present. This is the position where the best gripping power can be generated, and is situated below the forearm and above the butt. This portion is often covered with a wrap, but other times left bare to create a simple seamless style.

A player skilled at very thin cut shots, and shots in which a ball must pass cleanly through a very narrow space (such as the cue ball between two of the opponent's object balls with barely enough room) to avoid a foul and/or to pocket a ball. Such shots may be referred to as "surgery", "surgical shots", "surgical cuts", etc. (chiefly US, colloquial). See also feather (US) or snick (UK).

Either to hit the balls hard with no intention in mind other than to get lucky (or 'hit-and-hope'), or to shoot hard at the money ball ball with the same intention. Compare slop and fluke.

Chiefly British: The cushion on the top rail. Compare foot cushion; contrast bottom cushion.