The phrase “as sour as vinegar” is an idiom used to describe someone who is unpleasant, disagreeable, or in a bad mood. It compares their demeanor to the sour taste of vinegar, emphasizing negativity or irritability.


Meaning of “as sour as vinegar”

1. Sour or disagreeable personality

This idiom typically refers to someone’s sour temperament or unfriendly attitude.

Example:

“The old man greeted us ill-naturedly, his face as sour as vinegar.”

2. Bad mood or irritability

It can also describe a temporary state of irritability or grumpiness.

Example:

“Mary’s been as sour as vinegar all day.”


Origins and usage of “as sour as vinegar”

The comparison to vinegar stems from its distinctively sour taste, often associated with sharpness or unpleasantness. The idiom uses this metaphor to vividly describe sour moods or personalities.


Synonyms of “as sour as vinegar”

Here are some alternative expressions with similar meanings:

As bitter as gall

“She spoke to me, as bitter as gall.”

Grumpy

“He’s been grumpy all morning.”

In a foul mood

“She’s clearly in a foul mood today.”


The idiom “as sour as vinegar” vividly conveys the idea of an unpleasant or disagreeable mood or personality. Its metaphorical use makes it a colorful way to describe someone’s bad temper.

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