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bug

Any of various species of marine (saltwater or freshwater) crustaceans; e.g.

bʌɡDocumented since 1620shistorical136 viewsLast reviewed Jun 29, 2026+ Add a definition
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Born ~1620 · no dated citations yet
1620BornToday, 2026
📜 This word in 1898 dialectexpand

Written bugge Sc. (JAM.) [bug.]

Joseph Wright, English Dialect Dictionary (1898–1905)

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US
#1·Apr 26, 2026US

Any of various species of marine (saltwater or freshwater) crustaceans; e.g. a Moreton Bay bug, mudbug.

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#2·Apr 26, 2026US

(informal, proscribed) Any insect, or sometimes an arachnid, crustacean, or other arthropod, especially one that is small, terrestrial, or seen as a pest.

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#3·Apr 26, 2026US

(entomology) An insect of the order (the “true bugs”).

These flies are a bother. I’ll get some bug spray and kill them.
Origin: First attested in this form around 1620 (referring to a “bedbug”), from earlier beetle, from which is traced alternatively to: * a Celtic root found in and obsolete ; compare Welsh threat, fear and . * , from , to swell; compare , dialectal Low German goblin, snot. * or to a word related to buck and originally referring to a goat-shaped spectre. For the “insect” meaning the assonance with , from , from , *buzdô, from the same ultimate source as above, might have played a role. Compare , . More at bud. But ultimately this convergence of meaning doesn't prove a conflation of the two terms; th. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
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