Idiom of the day :- Plain Jane

Usage, examples and definition of the Idiom :-

A plain Jane is a girl or young woman whose looks are ordinary or common. Because ‘plain’ and ‘Jane’ rhyme, this is a rhyming idiom used to describe a girl — regardless of her name — who is neither pretty nor ugly. ‘Betsy was a plain Jane when we were in school but she’s certainly a beautiful girl today.’