Definition of post up

This is to lay down the money on the table in a betting game before play begins to ensure pay up at the end.

24 Random Essential Billiards Terms

Also in the zone. Describes an extended period of functioning in dead stroke ("She's in the zone").
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.
Also tiptool, tip-tool. Any of a class of maintenance tools for cue tips, including shapers, scuffers, mushroom trimmers, tappers, burnishers and tip clamps. Road, league and tournament players often carry an array of tip tools in their cases. The term is generally not applied to cue chalk.
To intentionally lose a game, e.g. to disguise one's actual playing ability. An extreme form of sandbagging. See also hustle. See also Match fixing for the synonym "tank", used in sports more generally.
Verb: "To Clock" To carefully note the abilities or betting inclinations of other players for future reference.
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.
Asian Pocket Billiard Union. The APBU is a member of the WPA.
This is to execute a shot where the cue ball is controlled perfectly and stops where you want it to exactly.
This is a handicapping method where one player gets the break, and is allowed to choose any ball afterwards to put in their pocket.
This is English that turns into reverse English after contact with the object ball. This will close up the angle on a bank.
This is a ball that is resting on the edge of a pocket, and would be a very easy shot to pocket.
This is also used to describe the ball when it rests on the edge of the pocket, almost begging to drop.
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.

1- Shortened phrase of "ball-in-hand".

2 - In snooker, the ability to place the cue ball anywhere inside the boundaries of the D. This occurs at the start of a frame, and after the cue ball has been potted or forced off the table.
Also a short form of "Ball In Hand".

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 is a bank shot that goes off of the head rail and then straight to the pocket at the other end of the table.
Same as foul
This term refers to a cue stick that is bent or warped, so that the straightness, or lack thereof, of the cue offers less than ideal play. This can occur from storing the cue in the wrong atmosphere, i.e. too warm or humid, or from the quality of wood used during construction. Some cues are coated with fiberglass, carbon fiber or graphite in order to avoid warping.
Deviation of a ball from its initial direction of travel. Often the result of a poor-quality table and may be an artifact of the cloth, the bed, a ball with uneven weight distribution, or simply the floor the table stands on being uneven.
Same as gutter table. A table with a ball return system, as opposed to a drop pocket table.
Any shot in which the cue ball or an object ball has to squeeze by (just miss with almost no margin for error) another ball or balls in order to reach its intended target.
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.
In snooker, the pocket nearest the yellow spot.
The International Pool Tour is a professional sports tour created in 2005 by Kevin Trudeau and hosted by Rebecca Grant. It aims to elevate pool (pocket billiards) to the level of other modern sports.
This describes a shot where you bank the object ball off of a rail and then sink it in a corner pocket.