Idioms: “on the clock” & “off the clock”

“On the clock”: to be working/getting paid

Example:

The police officer stopped to have dinner on his break. The waitress offered him a beer. He said, “No thanks, I’m on the clock.”

 

 

“Off the clock”: not at work/off duty/not being paid to work

Example:

Rebecca works at a grocery store. She had just finished her shift and was leaving for the day.

On her way out, a coworker asked for her help. Rebecca said, “Sorry I can’t help, I’m off the clock.”