sour as vinegar

(as) sour as vinegar

Particularly unpleasant, disagreeable, peevish, or ill-tempered. After such a broken night of sleep, I woke up feeling as sour as vinegar. Her words were sour as vinegar when she greeted us. The baby must be teething because she's been sour as vinegar all day.
See also: sour, vinegar
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

*sour as vinegar

 
1. [of something] very sour. (*Also: as ~.) This milk is as sour as vinegar. The juice they gave us is sour as vinegar.
2. [of someone] ill-natured and disagreeable. (Fig. on {2}. *Also: as ~.) The old man greeted us ill-naturedly, his face as sour as vinegar. Jill: Is Mary in a bad mood today? Jane: Yes, sour as vinegar.
See also: sour, vinegar
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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