Definitions from Wiktionary (brainworm)

▸ noun:  A neurotropic nematode parasite (Parelaphostrongylus tenuis).
▸ noun:  (science fiction) Any parasitic, worm-like species that inhabits the brain of another organism, typically altering its behaviour or giving it special abilities.
▸ noun:  (figurative, informal) A song or melody that keeps playing inside of one's mind.
▸ noun:  (figurative, slang, sometimes derogatory) A persistent delusion or obsession; a deeply-ingrained or unquestioned idea.
▸ noun:  (4chan /lgbt/ slang) An intrusive, unwanted, internalized transphobic or invalidating thought or belief.



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