know onions

know your onions

(British & Australian humorous)

to know a lot about a particular subject That car salesman certainly knew his onions, didn't he?

Name	Pronounced	Usage
Suchart	-	Thai
Colby	['kəulbi]
Ctirad	-	Czech, Slovak
Yelyzaveta	-	Ukrainian
Elvira	[el'vaiərə]
Venceslaus	-	Medieval Czech (Latinized)