Definition of lost their stroke

A player who was playing very well but suddenly starts playing badly. e.g. "He was making everything on every shot, then lost his stroke and couldn't hit anything, costing him the match."

24 Random Essential Billiards Terms

This shot is a minimally calculated distressed shot which makes it evident to the opponent you no longer have any hope to winning the game.
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.
A pejorative term for an improper rack in which the balls are not properly in contact with their neighbors, often resulting in a poor spread on the break.
This is the way your hand is configured to support the shaft of the cue during a shot.
A rule in blackball whereby after an opponent has faulted and thus yielded two shots, if the incoming shooter pots a ball on the first shot, (s)he is still allowed to miss in a later shot and take a second shot in-hand (from the "D" or from baulk, or if the opponent potted the cue ball, from anywhere)—even on the black, in most variants. Also called the "two visits" rule; i.e., the two penalty shots are considered independent visits to the table, and the limiting variants discussed at two shots below cannot logically apply.
Adjectival expression for a player's deadly game; "watch out, he plays jam up.
A game that basically cannot be lost based on disparity of skill levels; "this game is a lock for him."
The ease with which a player is generating cue power, due to well-timed acceleration of the cue at the appropriate point in a shot.
A Carom game with lines drawn to form rectangles that restrict play and reduce the potential for high runs.
Ten Ball is a rotation is a rotation game very similar to nine-ball, using ten balls instead of nine, and with the 10 ball instead of the 9 as the "money ball".
The object of the game is pocket the 10-ball on any legal shot.
A low hit on the cue ball (but not as low as normal draw), often used to change the cue ball's angle of deflection off the object ball.
The Union Mondiale de Billard (French for World Union of Billiards) is the world governing body for carom (carambole) billiard games. The organization was founded in Madrid, Spain on 1 June 1959, and is dedicated to promoting the modern carom billiards games. The UMB monitors and controls international carom competitions and tournaments, and organizes an annual World Three-cushion Billiards Championship.
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.
Also known as Free-stroking. This is slang for when a player begins to play untroubled and relaxed because they have built up a substantial lead.
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".
An imaginary line dividing the table into two equal halves lengthwise. It intersects the head string, center string and foot string at the head spot, center spot and foot spot, respectively.
Using knowledge of the game and one's own abilities and limitations to choose the manner of shooting and the particular shot from an array presented, that has a degree of likelihood of success. This often requires a player to forego a shot that if made would be very advantageous but does not have a high likelihood of success, in favor of a safety or less advantageous shot that is more realistically achievable.
The intersection of the head string and long string, which is usually not marked on a table with a spot decal, unlike the foot spot, though some pool halls mark both spots so that racking can be done at either end of the table, and wear on the cloth from racking and breaking is more evenly distributed.
Successive games won without the opponent getting to the table; a five-pack would be a package of five games.
This is a shot where the cue ball follows directly behind the sunk object ball into the pocket right after it falls.

1- Applying very powerful follow on the cue ball thereby causing the maximum amount of follow.

2- A powerful follow shot with a high degree of top spin on it; usually when the object ball being hit is relatively close to the cue ball and is being hit very full; also known as "prograde top spin" or "prograde follow" (when referring to the action on the shot rather than the shot per se), and as a "jenny" in Australia.

This refers to a ball that is positioned close to a rail, offering a shot where the cue must hit the rail and the ball almost simultaneously, this position can also offer a defensive shot where the cue ball can be hidden between that object ball and the rail.
A shot in which the cue ball is driven first to one or more rails, then hits an object ball and kisses back to the last rail contacted. It is a common shot in carom games, but can be applied to such an instance in any relevant cue sport.
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.