know one's stuff (English, verb)
expansion: know one's stuff (third-person singular simple present knows one's stuff, present participle knowing one's stuff, simple past knew one's stuff, past participle known one's stuff)
Senses:
glosses: To be knowledgeable about and competent at a particular subject or task.
tags: informal
intransitive
Forms:
form: knows one's stuff
tags: present
singular
third-person
form: knowing one's stuff
tags: participle
present
form: knew one's stuff
tags: past
form: known one's stuff
tags: participle
past