nothing if not somethingnothing if not (something)
this more than anything else.
She is nothing if not ambitious.
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.
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.