| bedbug | (noun) bug of temperate regions that infests especially beds and feeds on human blood | Synonyms: bed bug, chinch, Cimex lectularius |
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| bug | (noun) insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosis | Synonyms: hemipteran, hemipteron, hemipterous insect |
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| (noun) general term for any insect or similar creeping or crawling invertebrate | - |
| (noun) a minute life form (especially a disease-causing bacterium); the term is not in technical use | Synonyms: germ, microbe |
| (noun) a small hidden microphone; for listening secretly | - |
| (noun) a fault or defect in a computer program, system, or machine | Synonyms: glitch |
| (verb) annoy persistently | Synonyms: badger, beleaguer, pester, tease |
| (verb) tap a telephone or telegraph wire to get information | Synonyms: intercept, tap, wiretap |
| crotonbug | (noun) small light-brown cockroach brought to United States from Europe; a common household pest | Synonyms: Blattella germanica, Croton bug, German cockroach, water bug |
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| debug | (verb) locate and correct errors in a computer program code | - |
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| doodlebug | (noun) the larva of any of several insects | Synonyms: ant lion, antlion |
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| (noun) a small jet-propelled winged missile that carries a bomb | Synonyms: buzz bomb, flying bomb, robot bomb, V-1 |
| (noun) a small motor vehicle | - |
| firebug | (noun) a true bug: brightly colored bug that can exude a stain | - |
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| (noun) a criminal who illegally sets fire to property | Synonyms: arsonist, incendiary |
| humbug | (noun) something intended to deceive; deliberate trickery intended to gain an advantage | Synonyms: dupery, fraud, fraudulence, hoax, put-on |
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| (noun) pretentious or silly talk or writing | Synonyms: baloney, bilgewater, boloney, bosh, drool, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
| (noun) communication (written or spoken) intended to deceive | Synonyms: snake oil |
| (verb) trick or deceive | - |
| jitterbug | (noun) a jerky American dance that was popular in the 1940s | - |
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| (verb) do the jitterbug | - |
| ladybug | (noun) small round bright-colored and spotted beetle that usually feeds on aphids and other insect pests | Synonyms: lady beetle, ladybeetle, ladybird, ladybird beetle |
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| litterbug | (noun) a person who litters public places with refuse | Synonyms: litter lout, litterer |
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| mealybug | (noun) scalelike plant-eating insect coated with a powdery waxy secretion; destructive especially of fruit trees | Synonyms: mealy bug |
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| redbug | (noun) larval mite that sucks the blood of vertebrates including human beings causing intense irritation | Synonyms: chigger, harvest mite, jigger |
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| shutterbug | (noun) a photography enthusiast | - |
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| spittlebug | (noun) small leaping herbivorous insect that lives in a mass of protective froth which it and its larvae secrete | Synonyms: spittle insect |
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| superbug | (noun) a strain of bacteria that is resistant to all antibiotics | - |
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| (noun) a strain of pest accidentally imported into Florida from the Middle East then spread to California where it is a very serious pest feeding on almost all vegetable crops and poinsettias | Synonyms: Bemisia tabaci, poinsettia strain |
| tumblebug | (noun) any of various dung beetles | - |
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