Definition from Wiktionary, the free dictionary
See also: bem
Acronym of bug-eyed monster.
BEM (plural BEMs)
- (science fiction, fandom slang, often derogatory) A stock character in science fiction; a grotesque creature, often an extraterrestrial, that menaces the protagonists.
- Brave New Words: The Oxford Dictionary of Science Fiction, Oxford University Press, 2007, pp. 14–15
- BEM n. at the OED Science Fiction Citations Project