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
Caetlin	KAYT-lin	English (Rare)
Zainab	-	Arabic, Urdu
İSmaİL	-	Turkish
Barrie	['bæri]
Hammer	['hæmə]
Aafje	-	Dutch