piranha
/pɪˈɹɑn(j)ə/ noun C2- 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.
Plural piranhas
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