Definition of protect

This is the act of keeping your ball location advantages the way they are, and not allowing your opponent to even things out in the game of one pocket.

24 Random Essential Billiards Terms

To intentionally rebound the cue ball off both of the pocket points to achieve position.
This is the raised portion on the side of the table; the cushions are essentially rubber bumpers covered in the table cloth.
Also bigs, big balls, big ones. In eight-ball, to be shooting the striped suit (group) of balls (9 through 15); "you're big, remember", "you're big balls" or "I've got the big ones". Compare stripes, yellows, high, overs; contrast little.
New Zealand Billiards and Snooker Association.
Refers to a person gambling when he has no money. As in, "That jerk can't pay up, he was shooting air barrels the whole time".
The motion of the cue stick and the player's arm on a shot;
The strength, fluidity and finesse of a player's shooting technique; "she has a good stroke."
A combination of finesse, good judgement, accuracy and confidence.
An upright pin, which looks like a miniature bowling pin, cone or obelisk. Skittles, as employed in billiards games, have been so-called since at least 1634. One standardized size, for the largely Italian and South American game five-pins, is 25 mm (1 in.) tall, with 7 mm (0.28 in.) round bases, though larger variants have long existed for other games such as Danish pin billiards. Depending upon the game there may be one skittle, or several, and they may be targets to hit (often via a carom) or obstacles to avoid, usually the former. They are also sometimes called pins, though that term can be ambiguous. Because of the increasing international popularity of the Italian game five-pins), they are sometimes also known even in English by their Italian name, birilli (singular birillo). Skittles are also used as obstacles in some artistic billiards shots. #Flat, thin rectangular skittles, somewhat like large dominoes, approximately 6 in. tall by 3 in. wide, and placed upright like an obelisks on the table in specific spots, are used in the obsolescent and principally Australian games devil's pool and victory billiards. Depending upon the exact game being played, there may be one pin, or several of various colors (e.g. ten white and two black in devil's pool), and they may be targets or obstacles, most commonly the latter. They are usually made of plastic, and are increasingly difficult to obtain, even from Australian billiards suppliers. A black obelisk skittle of this sort features prominently, as a particularly dire hazard, in several scenes of sci-fi/pool film Hard Knuckle (1992, Australia). Skittles as used in billiards games date to ground billiards (13th century or earlier) played with a mace, and hand-thrown games of bowls from at least the same era using the same equipment. Ball games using a recognizable form of skittle are known from as early as ca. 3300 BCE in Ancient Egypt.
This is any game of pool played with money on the line. You can "put some action" on the game.
A term used to indicate balls that are frozen, or close enough that no matter from which angle they are hit from the combination will send the outer ball the same direction. "Are the 2 and 7 pointing at the corner?? Okay, I'll use that duck to get position way over there."
Same as visit.
Slang for a mechanical bridge.
A specific way of holding the shaft in your hand. The closed hand bridge is a hand bridge where the index finger wraps over the cue stick for control.
This refers to the cluster of balls remaining in a similar position to where they were within the break
Same as cue.
A type of rest, with a straight shaft and "x"-shaped head for resting the cue upon.
A tournament format in which each contestant plays each of the other contestants at least once. In typical league team play, round robin format means that each member of the home team plays each member of the visiting team once. This format is used by BCAPL, VNEA and many other leagues.
Play, from the opening break shot until one player has won (or the game has been halted for some reason by a referee). Games are the units that make up matches, races (in some senses of that term) and rounds. Essentially the same as frame, except with regards to straight pool, which is a multi-rack game.
In snooker, the second-highest value colour ball, being worth six points.
This is a series of angled rails present within some pool tables that directs pocketed balls to a central location on the table for retrieval after the game.
A foul where the rules are blatantly, intentionally violated, with a stiffer penalty (e.g., loss of game) than normal.
Modification of the rules and/or scoring of a game to enable players of variable abilities to compete on a more even playing field. Examples of handicapping include spotting balls and giving games on the wire to an opponent. In league play, other forms of handicapping include awarding compensating points to a lesser-skilled team, or using numerical player ranking systems to adjust final scores between opponents of different skill levels.
Describes a ball rolling along a rail in contact or near contact with it, or which makes multiple successive contacts with the rail.
This a shot that hits the object ball at the nine ball to see if you can get lucky by sinking the nine ball in any pocket. (also see Rolling the Cheese and Cheese the Nine).

1- This is a knowledgeable shot showing skill on the movement of the cue ball.

2- This is an experienced one pocket pool player that shows extraordinary skill at coordinating the cue balls and object balls for safety plays.