know your stuff

US /noʊ jʊər stʌf/
UK /noʊ jʊər stʌf/
"know your stuff" picture
1.

işini bilmek, konuya hakim olmak

to be very knowledgeable and skilled in a particular area or subject

:
You can trust her advice; she really knows her stuff when it comes to financial planning.
Tavsiyesine güvenebilirsin; finansal planlama konusunda gerçekten işini biliyor.
The new mechanic clearly knows his stuff; he fixed the engine in no time.
Yeni tamirci açıkça işini biliyor; motoru hemen tamir etti.