Definition of Three cushion billiards

To fail to make a legal shot.

The non-red colored ball meant to be pocketed in a game of snooker, or the next ball meant to be pocketed in a particular game.

A (principally American) term in eight-ball for either of the set of seven balls (stripes or solids) that must be cleared before sinking the 8 ball. Borrowed from card games. Generally used in the generic, especially in rulesets or articles, rather than colloquially by players. See also group for the British equivalent.

When an opponent either purposely successfully executes a defensive shot or misses their shot resulting in a bad leave for the next player.
Example: "I was left bad every time he missed his shot".

The triangular device, generally plastic, used to group the balls in a pyramid form prior to the beginning of a game.

When the rules of the opening break are broken. Ex: If not enough balls contact with rails off the break.

This is a term to describe 100 break points in a game of snooker.

In team match play when playing one-on-one matches, if one team is short a player, a player on that team is called back to play a second match.
For example: Team A has 6 players, Team B has 4 players. There will be five individual matches played. For the fifth match Team A can pick a player from Team B to play a second match against their fifth match player.

Chiefly American, and largely obsolete: Same as referee.

Nine Ball is a rotation game so a player must hit the lowest numbered ball first.
The object of the game is pocket the 9-ball on any legal shot.

This is when it is necessary to change a set handicap after play indicates it favors one player more than the other.

A player's turn at the table, also known as an inning.

A term used to indicate balls that are frozen, or close enough that no matter from which angle they are hit from the combination will send the outer ball the same direction. "Are the 2 and 7 pointing at the corner?? Okay, I'll use that duck to get position way over there."

The act of setting up the balls for a break shot. In tournament play this will be done by the referee, but in lower-level play, players either rack for themselves or for each other depending on convention.

In eight-ball, when all object balls are balls-on for either player.
A description of a break shot in which the rack (pack) is spread apart well. See also the open break requirement in some games' rules, including eight-ball and nine-ball.
In carom billiards, descriptive of play in which the balls are not gathered.

Principally British: In snooker, if a player wins a match without the need for the final session to be played (for example, if a player wins a best-of-25-frames match split into three sessions - two sessions of eight frames and one of nine - by a margin of say, 13 frames to 3), then they are said to have won the match "with a session to spare".

When a player is playing flawlessly, just "cannot miss" and the game seems effortless.

(Jack and Jill) Mixed doubles match (each team has one male and one female).

This is the running score of a player during his inning of play. The sum of the continuously scored points, or where the player stands in the run on the table.

Failure to hit an object ball at all with the cue ball. In most sets of rules, this is a foul like any other. However, in some variants of bar pool a table scratch while shooting for the 8 ball is a loss of game where other more minor fouls might not be, as is scratching on the 8 ball (neither result in a loss of game in most professional rules).
By way of drift from the above definition, the term is also applied by many league players to the foul in more standardized rules of failing to drive a (any) ball to a cushion, or to pocket a legal object ball, after the cue ball's initial contact with an object ball.
By way of entirely different derivation ("scratch off the table"), it can also mean knocking the cue ball (or more loosely, any ball) completely off the table.

The person who is a provider of all or part of a player's stake (money) for a gambling session in which one is not a player.

As a result of the opening break shot (the "snap"), usually said of winning by pocketing the money ball ("won on the snap", "got it on the snap", etc.) Employed most commonly in the game of nine-ball where pocketing the 9 ball at any time in the game on a legal stroke, including the break shot, garners a win.

Same as cue.

This is a kind of cue made of only two pieces of wood, and joined together using an advanced adhesive along the points of the cue. This connection gives the cue a flawless look and a fluid feel when shooting.