Note: these 'words' (valid or invalid) are all the permutations of the word bug. These words are obtained by scrambling the letters in bug.
Definitions and meaning of bug
First attested in this form around 1620 (referring to a bedbug), from earlier bugge(“beetle”), a conflation of two words:
Middle Englishbugge(“scarecrow, hobgoblin”), from Proto-Germanic*bugja-(“swollen up, thick”) (compare Norwegianbugge(“big man”), dialectal Low German Bögge(“goblin”, “snot”)). Perhaps originally from a word related to buck and originally referring to a goat-shaped specter.
Middle Englishbudde(“beetle”), from Old Englishbudda (see sċearnbudda(“dung beetle”)), from Proto-Germanic*buddô, *buzdô (compare Low GermanBudde(“louse, grub”), Norwegianbudda(“newborn domestic animal”)). More at bud.
The term is used to refer to technical errors and problems at least as early as the 19th century, predating the commonly known story of a moth being caught in a computer.
enPR: bŭg, IPA(key): /bʌɡ/
(entomology) An insect of the order Hemiptera (the “true bugs”).
Any of various species of marine or freshwater crustaceans; e.g. a Moreton Bay bug, mudbug.
(colloquial) Any insect, arachnid, or other terrestrial arthropod that is a pest.
(colloquial, US) Any insect, arachnid, myriapod or entognath.
(Britain, obsolete, specifically) A bedbug.
1874, Henry Sampson, A history of advertising (page 278)
Speaking of advertising changes of name, a title by which those lodging-house pests, bugs, are now often known, that of Norfolk Howards, is derived from an advertisement in which one Ephraim Bug avowed his intention of being for the future known as Norfolk Howard.
(chiefly computing and engineering jargon) A problem that needs fixing.
A contagious illness; a bacterium or virus causing it
(informal) An enthusiasm for something; an obsession
(informal) A keen enthusiast or hobbyist.
1961, Kiplinger's Personal Finance (volume 15, number 12, page 34)
Incidentally, the camera manufacturers have had a new worry—that they might "kill off the hobby," as U.S. Camera magazine put it recently—by automating to the point that real camera bugs would feel no challenge.
A concealed electronic eavesdropping or intercept device
A small and usually invisible file (traditionally a single-pixel image) on a World Wide Web page, primarily used to track users.
(broadcasting) A small, usually transparent or translucent image placed in a corner of a television program to indicate what network or cable channel is televising it
(aviation) A manually positioned marker in flight instruments.
2019, Tora Holmberg, Annika Jonsson, Fredrik Palm, Death Matters: Cultural Sociology of Mortal Life, Springer (→ISBN), page 130:
The arguably most debated bareback practice that came to attract attention early on (and still does) was that of “bug chasing,” in which HIV-negative men (bug chasers) actively seek out sex with HIV-positive men (gift givers).
(poker) A limited form of wild card in some variants of poker.
(paleontology, slang) A trilobite.
2007, Kirk Johnson, Cruisin' the Fossil Freeway, p. 174:
We asked Harris if he had any recommendations about seeing the famous trilobite digs. He said we should just drive out to his claim in the Wheeler Quadrangle, and it was just fine with him if we dug a few bugs.
(petroleum industry, slang, dated)Synonym of oil bug
July 1933, Popular Science:
Now, only three years later, most of the major oil companies maintain staffs of these men who examine cores, classify the various types of "bugs," or foraminifera, and make charts showing the depths at which each of the hundreds of types is found.
(slang, horse-racing) A young apprentice jockey.
(printing)Synonym of union bug
Adjectives often applied to “bug”: major, minor, serious, critical, nasty, annoying, important, strange, stupid, flying, silly.
See also Thesaurus:defect
bug (third-person singular simple presentbugs, present participlebugging, simple past and past participlebugged)
(informal, transitive) To annoy.
(transitive) To install an electronic listening device or devices in.
See also Thesaurus:annoy
Hemiptera on Wikipedia.Wikipedia
Hemiptera on Wikispecies.Wikispecies
Hemiptera on Wikimedia Commons.Wikimedia Commons
Software bug on Wikipedia.Wikipedia
From Old Norsebúkr, from Proto-Germanic*būkaz, cognate wtih Norwegian, Swedishbuk, GermanBauch, Dutchbuik.