know one's stuff

/nˈəʊ wˈɒnz stˈʌf/

/nˈoʊ wˈʌnz stˈʌf/

[phrase]

to know one's stuff

[PHRASE]

to be very knowledgeable about or skillful in a particular field of work

Examples

1. I know my stuff.

2. She's an excellent teacher - she really knows her stuff.

3. A Skillshare Premium Membership gives you unlimited access to more than 25,000 classes in all kinds of skills like, writing, design, and animation from experts who know their stuff.

4. This is where finding a key partner who knows their stuff can really help too!