know (something) backwards and forwards

know (something) backwards and forwards

To be extremely familiar with a particular subject, field, or piece of writing, film, music, etc. I've read this book so many times, I know it backwards and forwards. You should ask Samantha about the issue—she knows car engines backwards and forwards.
See also: and, backward, forwards, know
Farlex Dictionary of Idioms.

know something backwards and forwards and know something forwards and backwards

Fig. to know something very well; to know a passage of language so well that one could recite it backwards as well as forwards. Of course I've memorized my speech. I know it backwards and forwards.
See also: and, backward, forwards, know
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • know backwards and forwards and know forwards and backwards
  • know like a book, to
  • bend
  • bend over backward(s)
  • bend over backwards
  • bend over backwards to do something
  • bend/lean over backwards to do something
  • seven-seven-three-aitch
  • 773H
  • aitch