know one's onions (English, verb)
expansion: know one's onions (third-person singular simple present knows one's onions, present participle knowing one's onions, simple past knew one's onions, past participle known one's onions)
Senses:
glosses: Synonym of know one's stuff, to be knowledgeable about a given subject or task.
tags: informal
Forms:
form: knows one's onions
tags: present
singular
third-person
form: knowing one's onions
tags: participle
present
form: knew one's onions
tags: past
form: known one's onions
tags: participle
past