Definition of Sandbag

1- A tip tool with fine, sharp points used to roughen the cue tip to better hold chalk after it has become hardened and smooth from repeated impacts with the cue ball. Tappers are firmly tapped on or pressed against the tip. Scuffers serve the same purpose, but are used differently.

2- Describes a shot where one has a chance to miscue. Usually heard in reference to long draw shots. As in, "It's a tip-tapper!".

A foul where the rules are blatantly, intentionally violated, with a stiffer penalty (e.g., loss of game) than normal.

New Zealand Billiards and Snooker Association.

This is a ball that is left in a position that allows an easy shot, while time is spent working with other balls to better your position in the game.

Any ball that may be legally struck by the cue ball.

Also nurse shot, nursery shot. In carom games such as straight rail, balkline and cushion caroms, where all the balls are kept near each other and a cushion, and with very soft shots, can be "nursed" down a rail on multiple successful shots that effectively replicate the same ball setup so that the nurse shot can be repeated again (and again, etc.). Excessive use of nurse shots by players skilled enough to set them up and pull them off repeatedly at will is what led to the development of the balkline carom billiards game variations, and repetitive shot limitation rules in English billiards. A clear example of why: In 1907, Tom Reece scored a record break of 499,135 consecutive points over a period of five weeks, without a miss, using the cradle cannon nurse shot.

A highly skilled hustler making money gambling while traveling. Fast Eddie Felson in The Hustler was a road player. One of the most notorious real-life road players is Keith McCready.

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.

A type of nurse shot used in English billiards in which two coloured balls are positioned on either side of the mouth of a snooker table pocket but not touching and, thus placed, can be successively contacted and scored off over and over by the cue ball without moving them.

A material, usually leather, placed on the end of a cue stick that comes in contact with the cue ball.

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.

This is a type of shot that shows complete control over the object ball and the cue ball.

Skilled playing in which knowledge of ball speed, angles, post-impact trajectory, and other factors are used to gain position (i.e. a good leave) after the target ball is struck. The goals of position play are generally to ensure that the next shot is easy or at least makeable, and/or to play a safety in the advent of a miss (intentional or otherwise).

Nine Pin (also known as Goriziana) is a carom billiards game. The game has nine pins in the center of a table. It is played by two teams of 1 or 2 players. Three balls are used of which two are cue balls. Each team (or each player) aims to hit their opponent's ball and from there score points by hitting onto the red ball and also by making the opponent's and/or the red ball knock over the pins.

In snooker, a situation during a frame in which the first line of the remaining reds grouped together, where the original pack was, are in a straight horizontal line. This has implications when opening the pack, as a full-ball contact off the top cushion will usually cause the cue-ball to stick to the red and fail to develop a potting opportunity.

This is a tip tool for cleaning the edges of you tip after mushrooming occurs.

In the eight-ball game variant blackball, also known as eight-ball pool, a differently colored but otherwise identical replacement for the red group (i.e., what would be the solids in an American-style pool ball set).

Also yellow(s).
In snooker, the lowest-value colour ball on the table, being worth two points. It is one of the baulk colours.
In blackball, one of two groups of seven object balls that must be potted before the eight ball; compare stripes; contrast red ball.

Artistic pool is a trick shot competition, inspired by the related discipline of artistic billiards.

Also bar rules, pub pool, tavern pool. Pool, almost always a variant of eight-ball, that is played by bar players on a bar table. Bar pool has rules that vary from region to region, sometimes even from venue to venue in the same city, especially in the U.S. Wise players thus ensure understanding of and agreement to the rules before engaging in a money game under bar rules. Typical differences between bar pool and tournament eight-ball are the lack of ball-in-hand after a foul, the elimination of a number of fouls, and (with numbered ball sets) the requirement that most aspects of a shot be called (including cushions and other object balls to be contacted) not just the target ball and pocket. Bar pool has evolved into this "nitpicky" version principally to make the games last longer, since bar pool is typically played on coin-operated tables that cost money per-game rather than per-hour. Competitive league pool played on bar tables, however, usually uses international, national or local/regional league rules, and is not what is usually meant by "bar pool".

This describes a shot where you bank the object ball off of a rail and then sink it in a corner pocket.

Chiefly British: Short for side spin. In Canadian usage, the term is sometimes used as a verb, "to side".

This is the act of disturbing you opponents good looking balls in the hope that they might move over and help you out in the game of one pocket.

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.