be a (something) to (one's) fingertips(redirected from are a to their 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.
See also: fingertip
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.