1837 C. Dickens xl. 437 A vagabondish who's-afraid sort of bearing.
1854 H. H. Riley v. 75 Next came the sun-fish, jerking along, filled with fire and fury, with a kind of who's-afraid sort of look.
1915 G. B. Shaw in 8 May 109/2 Nothing that I have read in Butler, or gathered from his conversation, conveys the very faintest suggestion of terror or of the ‘who’s afraid’ attitude.