get your ass in gear
US /ɡɛt jʊər æs ɪn ɡɪr/
UK /ɡɛt jʊər æs ɪn ɡɪr/
1.
to start working hard or acting quickly and effectively
:
•
You need to get your ass in gear if you want to finish this project on time.
•
The coach told the team to get their asses in gear or they would lose the game.