subs. phr. (society).Conduct not in keeping with a conventional standard; vulgarity.
1882. Punch. ETON BOY. What an awful lot of energy youve got, uncle! UNCLE. Pretty well, my boy, for my time of life, I think! E. B. Yes! but energys such awful BAD FORM, you know!
1886. North American Review, cxlii. 621. They are taught that to become emotional or enthusiastic over anything is BAD FORM.
1889. Answers, 23 Feb., 205. 3. Hes awfully BAD FORMa regular cad, you know.