Two or more wagers made at a crap table in an attempt to insure one or the other. Also known as a "hedge" bet.

Making two (or more) bets at a craps table, one or the other of which is sure to win

Two or more bets attempting to ensure a win on at least one.

a wager claiming that the dealer does in fact have a blackjack

A bet that made up to 1/2 the original bet when the dealers' upcard is an Ace.

If the dealer's first card is an ace, the player can place an insurance bet. An insurance bet will win if the dealer's hole card is a King, Queen, Jack or 10.

Multiple wagers made to partially cover one another.

Two or more bets made to partially cover each other.