Definition, Meaning & Synonyms

know-one's-stuff

idiomatic expression

/noʊ wʌnz stʌf/

Definition

To have a thorough understanding and expertise in a particular subject or area.

Examples

“She really knows her stuff when it comes to digital marketing; her campaigns consistently outperform others.”
“If you want to be a successful chef, you need to know your stuff about ingredients and cooking techniques.”
“During the interview, it was clear that he knew his stuff about the company’s history and operations.”

Meaning

When someone knows their stuff, it means they are well-informed and highly skilled in their field, whether it’s a professional domain, a hobby, or any other interest.