Mrs. Grundy

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Mrs. Grun·dy

An extremely conventional or priggish person.

[After Mrs. Grundy, , character alluded to in the play Speed the Plough by Thomas Morton (1764-1838), British playwright.]
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Mrs. Grundy

A person who is too much concerned with being proper, modest, or righteous:
Informal: old maid.
References in classic literature ?
For the first time she was overstepping the bounds laid down by that harshest of tyrants, the Mrs.
I" is here introduced to personify the world in general--the Mrs.
Maud, being relieved from the fear of back-door beggary, soon became reconciled to bankruptcy; thought it rather a good joke, on the whole, for children like novelty, and don't care much for Mrs.