Definition of mushroom

When the tip of the cue begins to hang over the sides of the ferrule from constant use. This is the action of mushrooming, and it is important to use a tip tool to reshape the tip to fit the ferrule.

24 Random Essential Billiards Terms

Also pills, tally balls and shake balls. Small, round markers typically numbered 1 through 15 or 16, which are placed in a bottle for various random assignment purposes, such as in a tournament roster, to assign order of play in a multiplayer game, or to assign particular balls to players in games such as kelly pool.
This is English that turns into reverse English after contact with the object ball. This will close up the angle on a bank.
This refers to the distance of deflection that the ball comes off of the cue stick after a hit is applied with side spin on it.
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.
In three cushion billiards, the most standard shot where the third ball is advantageously placed in a corner.
To play even; without a handicap. Also called heads up.
This piece of armament keeps the butt of your cue safe from coincidental contact with the floor or other damaging incidents. It is usually made of a rubber composite or other durable or flexible material to absorb impact in the case of a collision.
In snooker, to leave the cue ball ball on the spot of a colour ball after potting it. This is usually performed where re-spotting of the colour ball would cause positional problems for the player, such as blocking available pots on one or more red balls.
The way in which a player holds the butt end of the cue stick.
The wrap of the cuestick where the hand is placed, also known as the "grip area."
This is to direct the cue ball by barely contacting an object ball.
In team match play when playing one-on-one matches, if one team is short a player, a player on that team is called back to play a second match.
For example: Team A has 6 players, Team B has 4 players. There will be five individual matches played. For the fifth match Team A can pick a player from Team B to play a second match against their fifth match player.
Sometimes interchangeable with scratch, though the latter is often used only to refer to the foul of pocketing the cue ball. A violation of a particular game's rules for which a set penalty is imposed.
National Amateur Pool League.
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".
Australian: Defeated with all seven of one's object balls (in blackball or eight-ball) remaining on the table.
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".
When playing 9 Ball, a dead ball is an object ball the falls into a pocket when a foul has been committed (for example, the shooter scratches or does not hit the lowest ball first). If keeping score by counting balls fallen, neither player gets the point for that ball.
Same as back spin.
This is a bank in which the object ball hit will cross the path of the cue ball on the way to its destination.
This is a ball that is left in a position that allows an easy shot, while time is spent working with other balls to better your position in the game.
An illegal shot (foul) in which the cue stick's tip contacts the cue ball twice during a single stroke. Double hits often occur when a player shoots the cue ball when it is very close to an object ball or cushion, because it is difficult to move the cue stick away quickly enough after the cue ball rebounds from the cushion or object ball.
The sides of a table's frame upon which the elastic cushions are mounted. May also be used interchangeably with cushion.
American CueSports Alliance. Their mission statement is "To heighten the interest and awareness of cue sports through the support and sanctioning of organized competition throughout the United States and North America."
This when you receive the first legitimate shot on the next "ball on" after there had been a series of safeties to try and hurt the other players chances. This term is often used in one pocket pool.