When it comes to gambling, the phrase "calls all bets off" means that all bets placed on a particular game or event are cancelled. However, there are several synonyms for this phrase that can be used in different contexts. Some alternatives include nullifying, voiding, revoking, rescinding, and annulling bets. These synonyms imply that the bets have been invalidated for some reason, whether it's due to an error or unforeseen circumstances. Whatever the reason, a gamer or participant would be wise to be familiar with these synonyms when it comes to dealing with bets and gaming.