Accumulator
This is another term for parlay.
Action
A valid Wager or bet. If a bet has action, it is a valid bet that will either win or lose. In Baseball a better can chose ‘Action’ meaning that it doesn’t matter if the listed pitchers throw out the first pitch the wager will still be good. For an ‘If’ bet, action means that the wager continues on to the second bet if the first bet wins, ties, or if the game is canceled.
Added Game
An added game is one that is not part of the regular Las Vegas rotation. Added games usually involve smaller schools, where handicapping information is harder to obtain. Due to the lack of information, most bookmakers will ‘Circle’ the game to offset the lack of information.
AFC
American Football Conference (NFL).
AL
American League (MLB).
ALCS
American League Championship Series (MLB).
All-In
With all-in betting, there are no refunds given for scratched or withdrawn competitors or teams in an event where a bet is placed. Should an event be cancelled then the amount bet will be refunded.
Ante-Post
Another term for future wagers.
ATS
Against the Spread or ATS refers to a bet involving the point spread instead of the actual result of the game.