nothing if not

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

nothing if not

Above all else, as in He was nothing if not discreet. Shakespeare used this idiom in Othello (2:1): "I am nothing if not critical." [c. 1600]
See also: if, not, nothing
References in classic literature ?
Once a week the German daily of the highest class lightens up its heavy columns--that is, it thinks it lightens them up--with a profound, an abysmal, book criticism; a criticism which carries you down, down, down into the scientific bowels of the subject--for the German critic is nothing if not scientific--and when you come up at last and scent the fresh air and see the bonny daylight once more, you resolve without a dissenting voice that a book criticism is a mistaken way to lighten up a German daily.
It was the first time I had heard her sing, and I lay by the fire, listening and transported, for she was nothing if not an artist in everything she did, and her voice, though not strong, was wonderfully sweet and expressive.
Bertha Kircher, however, was nothing if not feminine and she soon found that having someone to talk to who would not talk was extremely irksome.
Politically and economically it was nothing if not orthodox.