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
Evripidis	-	Greek
Cydney	SID-nee	English (Modern)
Mo	MO	English
Purushottam	-	Indian, Hindi, Marathi
Joyner	['dʒɔinə]
Hasim	-	Arabic