the worm turns
US /ðə wɜrm tɜrnz/
UK /ðə wɜrm tɜrnz/

1.
used to say that a person or group that has been weak or submissive suddenly becomes strong and powerful, often turning the tables on their oppressors
:
•
After years of being exploited, the worm turns and the workers are now demanding fair wages.
•
The underdog team finally won the championship; truly, the worm turns.