Good form ∨ Bad form Meaning, Definition & Usage

Definitions
  1. the general appearance, condition or action, originally of horses, atterwards of persons; as, the members of a boat crew are said to be in good form when they pull together uniformly. The phrases are further used colloquially in description of conduct or manners in society; as, it is not good form to smoke in the presence of a lady.

Webster 1913