the back of (one's) hand

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the back of (one's) hand

1. A rejection, snub, or rebuke; a display of contempt or scorn for someone or something. She met their accusations with the back of her hand. I give the back of my hand to anyone who says I'm not a good parent.
2. Used to represent one's complete knowledge of or familiarity with something. Usually used after the verb "know." 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, of
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

back of one's hand

Rejection or contempt, as in Unimpressed with him, she gave the back of her hand to his suggestion. This phrase is usually the object of a verb such as give or show. [Second half of 1700s] Back of the hand similarly means "an insult" in the term back-handed compliment (see under left-handed compliment) but has a quite different meaning in know like the back of one's hand (see under know like a book).
See also: back, hand, of
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in classic literature ?
He had no more expression than the back of my hand. His clothing was a dirty gray.
When I shook hand with him, he kissed back of my hand and I pulled it back quickly.
Craig Lennox Our GP expert will answer your questions every week Q What is the aching lump on the back of my hand? A It could be a ganglion.
The 26-year-old former St Edward's college student said he knows the coastline like "the back of my hand" having spent two years as a lifeguard plucking people to safety from its choppy waters.
But I know that famous photo like the back of my hand.
I stood on one leg with my eyes closed, I counted backwards from 100 in sevens and I pinched the skin on the back of my hand to see how long it took to go back to normal.
Down here I rub bookshelves and tables with the back of my hand
I wanted desperately to wipe my mouth with the back of my hand, to remove with my pure white skin any trace of this defiling substance.
I grieve at the river impacting the back of my hand, hollowing out my palm.
"I always apply a drop of the tanning liquid to the back of one hand, then rub the back of my hands together, making sure I cover the backs of both hands evenly.
He said: "When I get tired, I put my two feet back firmly on the ground and put the back of my hands on my knees and do my chakra healing.
I'M only 63, a keen gard-ener and I have dreaded age spots on the back of my hands and arms.