know (something) backward
know (something) backward
To be extremely familiar with a particular subject, field, or piece of writing, film, music, etc. Primarily heard in US. I've read this book so many times, I know it backward. You should ask Samantha about your problem—she knows car engines backward.
See also: backward, know
Farlex Dictionary of Idioms.
- (one's) true colours
- (Someone or something) called, they want their (something) back!
- tomorrow
- banner
- one rotten apple spoils the (whole) barrel
- one rotten apple spoils the (whole) bushel
- rotten apple spoils the barrel
- a bad apple spoils the (whole) barrel
- a rotten apple spoils the (whole) barrel
- a rotten apple spoils the (whole) bunch