piranha

/pɪˈrɑːn(j)ə//pɪˈrɑn(j)ə/

中文释义来自 ECDICT

First attested in 1869. The term entered English either via Portuguese piranha or Spanish piraña, from Old Tupi pirãîa.

1(ichthyology) 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).
2(figurative, derogatory) Someone, especially a critic