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.

Name	Pronounced	Usage
Rolf	RAWLF (German)	German, Swedish, Norwegian, Danish, English
Kimberley	KIM-bər-lee	English
Bairnsfather	['bɛənz.fa:ðə]
GÉRald	-	French
Ad	[æd]
FechÍN	FE-kheen	Irish