english
1
general::
Phrase(s): on the job working; doing what one is expected to do. • I’m always on the job when I should be. • I can depend on my furnace to be on the job day and night.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
1. At work, busy, as in We've got three men on the job. [Late 1800s] 2. Paying close attention, alert, as in Trust Jim to find out the details? he's always on the job.
American Heritage Idioms