From Longman Dictionary of Contemporary Englishif you think ... , you’ve got another think coming!you’ve got another think coming! if you think ... if you think ... , you’ve got another think coming!WRONG/INCORRECTused to tell someone that if they think someone is going to do something, they are wrong If you think I’m going to wait for you, you’ve got another think coming! → think
Examples from the Corpus
if you think ... , you’ve got another think coming!• If they think it's going to be an easy game, they've got another think coming! 