An exclamation expressing disbelief, dismissal, or mild annoyance; similar to 'nonsense' or 'bah.'
An onomatopoeia—a word that imitates the sound it represents. The 'sh' sound literally mimics dismissive hissing, appearing in English since at least the 1500s.
Pish is one of those wonderful English words that sounds like what it means—saying it aloud actually feels dismissive, which is why authors use it to show a character's attitude!
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