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
Asim	-	Turkish
Ratimir	-	Croatian, Medieval Slavic
Hayfa	-	Arabic
Ros	RAHZ, RAHS	English
Toril	-	Norwegian
Easton	EES-tən	English (Modern)