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
Estienne	-	Medieval French
Alvarez	[əl'va:hrez]
Florijan	-	Croatian
Bonifaz	BO-nee-fahts	German
Milan	MEE-lahn (Czech)	Czech, Slovak, Russian, Serbian, Croatian, Slovene, Bulgarian, Macedonian, Dutch
Jehoash	ji-HO-ash (English), jee-HO-ash (English)	Biblical