know (something) like the back of (one's) hand

(redirected from know it like the back of my hand)

know (something) like the back of (one's) hand

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 like the back of my hand. You should ask Samantha for directions—she knows this town like the back of her hand.
See also: back, hand, know, like, of