Meaning

• A wager, an agreement between two parties that a stake (usually money) will be paid by the loser to the winner (the winner being the one who correctly forecast the outcome of an event).

  "Dylan owes Fletcher $30 from an unsuccessful bet."

• A degree of certainty.

  "It’s a safe bet that it will rain tomorrow."

Meaning

• To stake or pledge upon the outcome of an event; to wager.

• To be sure of something; to be able to count on something.

  "Fancy going for a drink after work? You bet I do!"

• To place money into the pot in order to require others do the same, usually only used for the first person to place money in the pot on each round.

Meaning

• Expression of general agreement or acceptance.

• Exclamation indicating acceptance of a challenge or an absurd proposal.

• Exclamation of joy at good fortune.