Definition of undercut

Hitting the object ball with not enough of a cut angle; hitting the object ball too full or "fat". It is a well-known maxim that overcutting is preferable to undercutting. See also professional side of the pocket.

24 Random Essential Billiards Terms

See two-shot carry.
A stroke in which the cue's tip glances or slips off the cue ball not effectively transferring the intended force. Usually the result is a bungled shot. Common causes include a lack of chalk on the cue tip, a poorly groomed cue tip and not stroking straight through the cue ball, e.g. because of steering.
When a ball goes into a pocket then pops back out. It really is not witchcraft, but is usually because the pocketed ball was traveling to fast and either ricocheted off the back or sides of the pocket opening. Sometimes,on tables with plastic inserts, the object ball can bounce out from the bottom of the pocket.
Artistic pool is a trick shot competition, inspired by the related discipline of artistic billiards.
(Chiefly British) Said of an object ball that can easily be reached by the cue ball, or of a pocket that can easily be reached by a selected object ball, usually directly (i.e. without intervening kick, bank, carom, kiss or combination shots).
Describes lucky or unlucky "rolls" of the cue ball; "I had good rolls all night; "that was a bad roll." However, when said without an adjective ascribing good or bad characteristics to it, "roll" usually refers to a positive outcome such as in "he got a roll".
The roll: same as the lag.
Same as centre pocket.
A Baulk line is line drawn across the table 29 inches from the bottom cushion and parallel to that cushion.
Describing a difficult pot: "the awkward cueing makes this shot missable."
This is your pocket for sinking balls in a one pocket game.
Same as angle of reflection.
(Chiefly U.S.) Side spin (english) placed on a same side of the cue ball as the direction in which the object ball is being cut (left-hand english when cutting a ball to the left, and vice versa). In addition to affecting cue ball position, inside english can increase throw.
Any game which uses a rack composed of less than 15 balls.
The desired angle that must be created between the path of the cue ball and the path of the object ball upon contact to pot the object ball. It is usually measured to the center of the pocket. See also aiming line.
To fail to make a legal shot.
Used with an amount to signify money added to a tournament prize fund in addition to the amount accumulated from entry fees (e.g. "$500 added").
A player who was not shooting well during a match but suddenly turns it around and starts playing better and more accurately. Also known as "Finding a stroke" or "Found their stroke".
Successive games won without the opponent getting to the table; a five-pack would be a package of five games.
A shot where the shooter was trying to make the shot but misses. However, the result of the missed shot ends up being a very good defensive play.
Asian Pocket Billiard Union. The APBU is a member of the WPA.
The surface of the table used for play (often made with slate).
This is a tool that is used to shape a cue stick. It holds the cue in place while rotating it along a cutting edge. This tool can also be used to hold the cue in place while constructing or repairing other parts on the cue.
Either to hit the balls hard with no intention in mind other than to get lucky (or 'hit-and-hope'), or to shoot hard at the money ball ball with the same intention. Compare slop and fluke.
The effect of shooting regulation-weight object balls with an old-fashioned over-weight bar table cue ball, such that the cue ball moves forward to occupy (sometimes only temporarily), or go beyond, the original position of the object ball, even on a draw or stop shot, because the mass of the cue ball exceeds that of the object ball. Players who understand smash-through well can use it intentionally for position play, such as to nudge other object balls nearby the target ball. Smash-through also makes it dangerous in bar pool (when equipped with such a cue ball) to pocket straight-on ducks with a stop shot instead of by cheating the pocket because of the likelihood of scratching the cue ball.