to know one's stuff

āχāĻ‚āϰ⧇āϜāĻŋāϤ⧇ "know one's stuff"āĻāϰ āϏāĻ‚āĻœā§āĻžāĻž āĻ“ āĻ…āĻ°ā§āĻĨ

01

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

to [know] {one's} stuff definition and meaning
Idiom
Informal
āωāĻĻāĻžāĻšāϰāĻŖ
When it comes to astronomy, Professor Smith really knows his stuff.
LanGeek
āĻ…ā§āϝāĻžāĻĒ āĻĄāĻžāωāύāϞ⧋āĻĄ āĻ•āϰ⧁āύ