do (one's) homework(redirected from did their home work)
do (one's) homework
1. Literally, to complete school work that has been assigned to be done at home. You can't watch any more television until you do your homework!
2. To be thoroughly prepared and informed for something, such as a meeting, interview, or report. Be sure you do your homework before heading into that meeting; there's a lot at stake, and no one's going to like it if you aren't up to speed.
do one's homework
Be well prepared, as in Steve had done his homework before the meeting and could answer all of the client's questions . This usage transfers a school assignment to a broader context. [c. 1930]
do your homework
If you do your homework, you prepare for something, especially by finding out information about it. Before you buy any shares, do your homework. Doing your homework before you make your request will help you to have a confident manner.