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1.
Named for a character from the Sims video game, Mrs Crumplebottom is a prude and a killjoy who has no social life, and dislikes seeing public displays of affection.

In the Sims game, Mrs Crumplebottom regularly purse-whips and/or lectures other sims who kiss or make out in public.
Don't be a Mrs Crumplebottom.
by Simmaniac February 03, 2010
 
2.
Someone who is opposed to PDA, nudity and the like, as well as having many old-fashioned ideas and views and dressing up in Victorian style clothes.
Named after a character in The Sims franchise with the same mannerisms.
Mrs. Crumplebottom totally interrupted our date and hit me with her purse!
by Ainrana December 18, 2011