know backwards and forwards

know something backwards and forwards

also know something inside out

to be extremely well informed about something After 30 years in the fashion business, she knows it backwards and forwards. He knows New York inside out.

Related vocabulary: know something like the back of your hand

Common Names:

Name	Pronounced	Usage
Gertrud	GER-troot (German)	German, Ancient Germanic
Lateefah	-	Arabic
Elisabeth	e-LEE-zah-bet (German), e-LEE-sah-bet (Danish), i-LIZ-ə-bəth (English)	German, Dutch, Swedish, Norwegian, Danish, English, Biblical, Biblical Latin
Saba	-	Georgian
ŽIvka	-	Croatian, Serbian
Baki	-	Arabic