nothing if not something

nothing if not (something)

Most characteristically (something); (something) more than any other thing. In this phrase, "not" is always followed by a modifier of some kind that is emphasized as the most prominent attribute. He's nothing if not generous—that's his third donation this week. I am nothing if not patient, but even I have my breaking point.
See also: if, not, nothing
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

ˈnothing if not something

(informal) (used for emphasis) very; very much a particular type of person: She’s nothing if not fair.Her work is nothing if not original.
See also: if, not, nothing, something
Farlex Partner Idioms Dictionary © Farlex 2017
See also: