Good Form, Bad Form
.Comme il faut, bon ton; mauvais ton, comme il ne faut pas. Form means fashion, like the Latin forma.
· 
· 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.