Definition of Green ball

A shot aimed so that the center of the cue ball is in line with the edge of the object ball, eclipsing half of the ball. "Hit it just a little thinner than half-ball." Assuming a cling does not occur, the shot will impart post-contact momentum on the object ball in a direction 30° (which is arcsin(1 - x), where x is the fraction of object ball eclipsed: ½ in this case) off the direction of the cue-ball's pre-contact momentum. Also notable because the carom angle the cue ball takes is more consistent than at other contact points.

This term refers to a low percentage one pocket shot.

Slang term for the cue ball.

Play, from the opening break shot until one player has won (or the game has been halted for some reason by a referee). Games are the units that make up matches, races (in some senses of that term) and rounds. Essentially the same as frame, except with regards to straight pool, which is a multi-rack game.

This is the playing surface for billiards games. Consisting of 6 pockets, cushions on the side, and a felt layer covering the hard table portion, the length is usually twice as long as it is wide, but varies depending on the game at hand.

Any standard pool cue used to shoot the majority of shots in a match.

Used in snooker in reference to the position of the cue ball. It is above the object ball if it is off-straight on the baulk cushion side of the imaginary line for a straight pot (e.g. "he'll want to finish above the blue in order to go into the pink and reds"). It is also common to use the term high instead.

This is playing to a higher winning score than eight in the game of one pocket.

In the carom games, any shot where the end result is all the balls near each other; ideally, in position for the start of a nurse on the next stroke.

Linen made from flax and produced in Ireland which is often used to wrap the gripping area of the butt of a cue.

Named after their innovator, legendary cuemaker George Balabushka, Bushka rings are decorative bands of material incorporated into pool cues, commonly just above the wrap area, in the form of ebony and ivory blocks, or sometimes other materials, alternating in a checked pattern.

Describing a shot which requires one or more balls to be played off several cushions, such as an elaborate escape or a positional shot; "he'll have to send the cue ball round the angles to get good position."

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.

This is a tool used to keep your cue tip from mushrooming. This small tool slides over the tip and turns to refine the sides, keeping your tip shaped the way it should be.

A player of cue sports.

To "give someone weight" is to give them a handicap so the game is more even in skill level. If one player is significantly better than the other in a game, then you can add some weight, more or less balls for someone, to even the difficulty load between each player.

The horizontal plane directly in the center of the cue ball, which when hit exactly by the cue tip should impart no follow or draw.

A short, jabbed draw stroke usually employed so as to not commit a foul (i.e. due to following through to a double hit) when the cue ball is very near to the target object ball.

This is to take all the money from a player or to have lost all of your own money.

To seal the pores of a wooden cue's shaft or to smooth out minor dents in the shaft by rubbing vigorously with some material.
To similarly vigorously rub the edge of a cue tip (especially a new one) to fortify it against mushrooming and ensure that it is perfectly flush with the ferrule.

The Union Mondiale de Billard (French for World Union of Billiards) is the world governing body for carom (carambole) billiard games. The organization was founded in Madrid, Spain on 1 June 1959, and is dedicated to promoting the modern carom billiards games. The UMB monitors and controls international carom competitions and tournaments, and organizes an annual World Three-cushion Billiards Championship.

To intentionally hide one's "speed"; "he's on the stall."
To intentionally play slowly so as to irritate one's opponent. This form of sharking has been eliminated from many tournaments with a shot clock, and from many leagues with time-limit rules.

This is a carom shot that utilizes english and only two rails to achieve three cushion contacts.

Describing a pot played at such a pace as to just reach the pocket and drop in without hitting the back.