have another think coming
US /hæv əˈnʌðər θɪŋk ˈkʌmɪŋ/
UK /hæv əˈnʌðər θɪŋk ˈkʌmɪŋ/

1.
se tromper lourdement, avoir tort
used to tell someone that they are wrong about something and should change their opinion
:
•
If you think I'm going to help you cheat, you've got another think coming.
Si tu penses que je vais t'aider à tricher, tu te trompes lourdement.
•
She thinks she can just walk in and get the job, but she's got another think coming.
Elle pense qu'elle peut juste entrer et obtenir le poste, mais elle se trompe lourdement.