Legwork, in law enforcement slang, is the work necessary to solve a case. Legwork usually involves interviewing witnesses, investigating evidence and following leads. In business vernacular, legwork is the gathering, review and interpretation of the basic facts, figures and research necessary to achieve a goal.

What does the idiom legwork mean?

The physically or mentally demanding work required to do or accomplish something. I'm sure you'll be able to find a good job, but you've got to put in the legwork—one's not going to just fall into your lap. The case is so huge that I brought on a legal aid to help get through the legwork.

What is legwork used for?

You use legwork to refer to work that involves physical activity such as interviewing people or gathering information, especially when this work forms the basis of other, more intellectual work.