1
general::
Phrase(s): do one’s duty
1. to do one’s job; to do what is expected of one. • Please don’t thank me. I’m just doing my duty. • Soldiers who fight in wars are doing their duty. 2. Euph. to defecate or urinate. • We’re not leaving this restroom until you do your duty. • She did her duty in the potty, just like a big girl!
McGrawhill's American Idioms And Phrasal Verbs