Cutthroat or cut-throat, also sometimes referred to as three-man-screw, is a typically three-player or team pocket billiards game, played on a pool table, with a full standard set of pool balls (15 numbered object balls and a cue ball); the game cannot be played with three or more players with an unnumbered reds-and-yellows ball set, as used in blackball. Each player is commonly assigned a set of five consecutively numbered object balls, though the number of balls will vary by number of players. The object of the game is to be the last player with at least one ball of their group remaining on the table.
The name "cutthroat" is not unique to pool, but is used to refer to other games played with three or more players in which all players must fend for themselves, e.g. cutthroat bridge and cutthroat American handball.