To win at a backgammon game with the opponent having one or more pieces in the winner’s inner home row or on the bar.

(card games) A card game resembling chemin de fer with many forms - usually entailing the player(s) betting against two or three hands dealt - also bearing some similarities to blackjack.

Turned so that the back is now at the front.

Reversed, with the back now at the front.

(idiomatic) An infant.

(idiomatic) A person who is innocent, naive, inexperienced, or helpless, especially with respect to an unfamiliar situation or environment.

(idiomatic, Britain, euphemistic) Of an item of merchandise, to come into a person's possession without having been paid for; to have been acquired illegally.

Alternative spelling of backwater

(nautical) To reverse the action of the oars, paddles, or propeller, so as to force the boat or ship backward.

Alternative form of backbite