know your stuff

know (one's) stuff

To be very knowledgeable or skilled in some area. I think Nicole is our best candidate for the job—she really knows her stuff when it comes to corporate accounting.
See also: know, stuff

know your ˈstuff

(informal) know everything that you should know about a job, a subject, etc: I was very impressed by your lawyer. He really knows his stuff.
See also: know, stuff
References in periodicals archive ?
When it comes to your company's reputation, our clients and customers want to know three things: 1) You know your stuff; 2) You've done it before and can do it again; and 3) You know your stuff.
Answer: Get your sales team to focus on the Five Knows: Know your stuff.
You really have to know your stuff or you might wind up overpaying.
First, he said, it is important to be prepared educationally, to know your stuff, then work cooperatively to encourage the free flow of ideas.
If you're an out-of-town-reporter and you want to convince your editors that you really know your stuff, nothing works like a boll weevil in your lead.
Biz Replies You need to make sure your business plan is well researched and thorough and shows the bank manager you know your stuff - where you are heading with your venture, your competitors, the figures and the market in general.
Our clients and tenants want to know that you know your stuff; that you've done it before and can do it again; and (again) that you know your stuff.
Its a lot of critiquing and making sure you know your stuff,'' said Deagon.
Media training, a form of professional coaching, helps you know your stuff and gets you and your message focused.