Someone with airs and graces, but no real class is fur coat and no knickers.
Knickers in a twist
When your knickers are in a twist, you are angry and snappish over something trivial. 'Whenever he loses his car keys, he gets his knickers in a twist.'
An knickers idiom dictionary is a great resource for writers, students, and anyone looking to expand their vocabulary. It contains a list of words with similar meanings with knickers, allowing users to choose the best word for their specific context.
Dictionary of similar words, Different wording, Synonyms, Idioms for Idiom, Proverb knickers