be a (something) to (one's) fingertips

be a (something) to (one's) fingertips

To be a particular thing to the utmost degree. Oh, I'm a student to my fingertips—that's why I'm now pursuing a doctorate. Oh, she's French to her fingertips—she would never leave her country. Dad's a scientist to his fingertips, so he can't relate to your artistic sensibilities.
See also: fingertip, to
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