care a whit

care a whit

To care just the smallest amount. (A "whit" is an iota.) Often used in the negative. I don't care a whit what the neighbors say, I'm not taking that fence down!
See also: care, whit
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

didn't care a whit

 and don't care a whit
didn't care at all. Sally thought Joe liked her, but he didn't care a whit about her. I don't care a whit what you do with my old clothes.
See also: care, whit
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Our political system is not sensitive to the needs even of some of our own citizens who don't vote--the homeless, the imprisoned, the very poor--so how can we expect it to care a whit about people 5,000 miles from our voting booths, however miserable their situation?