Definition of top

Short for top spin, i.e. same as follow.
Chiefly British: The half of the table in which the object balls are racked (in games in which racked balls are used). This usage is conceptually opposite that in North America, where this end of the table is called the foot. In snooker, this is where the reds are racked, nearest the black spot; this is the area in which most of the game is usually played.
Chiefly American: Exactly the opposite of the above - the head end of the table. No longer in common usage.

24 Random Essential Billiards Terms

Describes a ball rolling along a rail in contact or near contact with it, or which makes multiple successive contacts with the rail.
A situation in which a ball strikes another ball which is close to a rail and the struck ball rebounds back into the ball it was hit by; usually but not always unintended.
This is the portion of the joint that actually connects the two sides of the cue, often called the pin or male end. This comes in a number of different sizes and shapes which some believe has an influence on the hit of the cue stick.
This is a fine powdery substance used to assist the sliding of the cue over the hand bridge.
A cluster of balls. In snooker, the bunch of reds that are typically left below the pink spot in the early stages of a frame, not including those reds that have been released into pottable positions.
The number of balls pocketed in an inning in pool (e.g., a run of five balls), or points scored in a row in carom billiards (e.g., a run of five points). Compare British break (sense 2), which is applied to pool as well as snooker in British English.
Extreme application of draw. This when the draw back of the cue ball is your first priority, and you apply extra draw to the hit of the cue ball.
The profile of the shaft of the cue as it as it increases in diameter from the tip to the joint. A "fast" or "slow" taper refers to how quickly the diameter increases. A "pro" taper describes a shaft that tapers rapidly from the joint size to the tip size so as to provide a long, untapered stroking area.
Either of the two shorter rails of a billiards or pocket billiards table.
A set of paired balls in the game of cribbage pool that have a number value which combined equal 15. For example, the 8 ball and the 7 ball added together equal 15 and thus constitute one cribbage if pocketed in succession.
Oceania Pocket Billiard Association.
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.
Same as position. "She got good shape for the next shot". See also position play, leave.
When a ball is given as a handicap it often must be called (generally tacit). A wild handicap means the ball can be made in any manner specifically without being called.
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.
This is a shot that attempts to move a number of balls onto your side of the table in a kind of herding attempt.
When a successful non penalized break is achieved which gives the object balls a broad spread on the table.

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 shot in which if the target is missed, the opponent is safe or will not have a desirable shot;
A shot in which there are two ways to score;
A shot in which a second ball is targeted to be pocketed, broken out of a cluster, repositioned or some other secondary goal is also intended.
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.
A tournament format in which a player is out of the tournament after a single match loss.
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.
Chiefly British. This is a shot in a snooker game where the first object ball hit contacts another object ball and the second one is pocketed. If both of the balls are red, or if the second ball would be on if the first ball had not been deemed free then it is an allowed shot.
Also smalls, small ones, small balls. In eight-ball, to be shooting the solid suit (group) of balls (1 through 7); "you're the small one" or "I've got the smalls". Compare little, solids, reds, low, spots, dots, unders; contrast big.