What is "it's on"? When can I use this expression?
"It's on" is an exclamation that expresses excitement, readiness, or anticipation for something. You can use this to express feelings of excitement before a competition, as the speaker has done so here. Ex: A: I bet I can run faster than you! B: Oh, it's on! Ex: A: My team is going to beat yours! B: It's on.
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