know stuff



know one's stuff

 and know one's onions
to know what one is expected to know. I know my stuff. I can do my job. She can't handle the assignment. She doesn't know her onions.
See also: know, stuff

know your stuff

to know a lot about a subject or be an expert at doing something When it comes to restoring grand pianos, he really knows his stuff.
See also: know, stuff

know your stuff

  (informal)
to know a lot about a subject, or to be very good at doing something When it comes to restoring grand pianos, Mr Morley really knows his stuff.
See also: know, stuff

Common Names:

NameGenderPronouncedUsage
Nettie['neti]
Esben-Danish, Norwegian
OrvokkiOR-vok-keeFinnish
Cosmina-Romanian
Platt[plæt]
Usman-Arabic