Definition of two shots

In blackball, a penalty conceded by a player after a fault. The incoming opponent is then allowed to miss twice before the faulting player is allowed another visit. Many local rules state the in-hand from the "D" or baulk (or if the opponent potted the cue ball, from anywhere) nature of the second shot is lost if a ball is potted on the first shot, that it is lost if the ball potted in the first shot was that player's last coloured ball (object ball in their group), and/or that there is only ever one shot on the black after a fault.

24 Random Essential Billiards Terms

Sometimes called spots and stripes, stripes and solids or, more rarely, bigs and littles or highs and lows.
All fifteen numbered balls are used in a conventional triangle rack.
Each player is assigned either the solid balls (1-7) or the striped balls (9-15). The object is to pocket all of your assigned balls and then pocket the 8-ball.
A shooter's body position and posture during a shot.
A pool table spread in which the balls are extremely easily positioned for a run out, and where little movement of the cue ball on each shot is necessary to obtain position on the next.
This is a particular shot where the potential for a miscue is higher because of the amount of draw that is attempted on the cue ball.
Accidentally causing the cue ball or any object ball to leave the table. It is normally a foul.
Artistic pool is a trick shot competition, inspired by the related discipline of artistic billiards.
Oceania Pocket Billiard Association.
Describing a pot played at such a pace as to just reach the pocket and drop in without hitting the back.
This is a player that will regularly loose money to a particular player that is obviously a better player.
Hitting the object ball with too large of a cut angle; hitting the object ball too thin. It is a well-known maxim that overcutting is preferable to undercutting in many situations, as is more often leaves the table in a disadvantageous position on the miss than does an undercut. See also professional side of the pocket.
(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.
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).
Named after Chicagoan J. E. Parker, it is a 3½ × 7 inch box drawn on a balkline table from the termination of a balkline with the cushion, thus defining a restricted space in which only a set number of points may be scored before one ball must be driven from the area. Now supplanted by anchor spaces, it was developed to curtail the effectiveness of the anchor nurse, which in turn had been invented to exploit a loophole in balkline rules: so long as both object balls straddled a balkline, there was no restriction on counts, as each ball lay in a separate balk space.
The pocket chosen to house the selected ball in your called shot.
This is the point on the object ball where the cue exactly impacts or the point at which two balls touch when they impact.
To shoot without taking enough warm-up strokes to properly aim and feel out the stroke and speed to be applied. One-stroking is a common symptom of nervousness and a source of missed shots and failed position.
0-2 Barbecue is a slang billiard term that refers to a single player loosing the first 2 matches in a double elimination tournament. This double loss results in that player being knocked out of the tournament without winning even one game.
Same as cloth (deprecated; it is factually incorrect).
This is a type of shot that is executed by an object ball caroming off of another object ball in order to gain the pocket.
This is a table that offers poor conditions for play; it is either dirty, wet, or overall poor quality.
This is to miss your shot but either luckily or on purpose leave your opponent with nothing to shoot at.
In blackball, a situation where the player cannot see any of the balls she/he wants to hit due to obstruction by other balls or the knuckle of a pocket. The player must call "total snooker" to the referee, which allows a dispensation to the player from having to hit a cushion after contacting the object ball, which is otherwise a foul.
A shot where the cue ball has no top spin or back spin on it when it impacts an object ball, and "stuns" out along the tangent line. Commonly shortened to just "stun."
This is when you strike a cue ball off center to gain control on the movement on the cue ball.