The most complete glossary of backgammon terms
To place two checkers together on one point (1) so they form a block or an anchor. Your opponent may not land or touch down on that point as long as the two checkers remain there.
The roll of 1 and 2 with two dice.
A backgammon variant in which the roll of 1 and 2 gives the player extra turns. See: How to Play Acey-Deucey.