piranha.
Any of certain freshwater fish of the subfamily Serrasalminae, native to South America; they are characterized by razor-sharp teeth and a reputation of being ferocious predators (despite most species being omnivorous).
Meaning & usage
Any of certain freshwater fish of the subfamily Serrasalminae, native to South America; they are characterized by razor-sharp teeth and a reputation of being ferocious predators (despite most species being omnivorous).
Someone, especially a critic, who appears to be part of a swarm and attacks someone when they are vulnerable, as if in a feeding frenzy.
Where this word comes from
First attested in 1869. The term entered English either via Portuguese piranha or Spanish piraña, from Old Tupi pirãîa.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.