Bet! Bet is a slang term of affirmation, agreement, or approval along the lines of “Cool!” or “I’m down!” It can also suggest doubt or disbelief: “Yeah, sure.”Click to see full answer. Also question is, what does BET mean in texting? Black Entertainment Television Subsequently, question is, what does Snapchat bet mean? Bet: Something is going to happen. Accordingly, how do you use the word bet? You may have heard the bet used in relation to gambling; however, it’s also a commonly used word in casual English here’s how to use it: I bet (you) We use this expression, informally, when you think that something will happen or when you think something is true. you bet. a safe bet. your best best bet. I bet / I’ll bet. What does Big Bet mean in slang?Big bet. A big bet (BB) is the larger of two fixed bet amounts in a fixed-limit poker game. A big bet is used in the final rounds of a game to increase the pot amount and thereby enable the possibility of a bluff. Big bets are generally double the wager of the initial or small bet.