Bikini
1940s: named after Bikini, where an atom bomb was exploded in 1946 (because of the supposed ‘explosive’ effect created by the garment).
wiktionary
From French bikini, named after the place name Bikini, from English Bikini, the name of the atoll where the United States tested nuclear weapons in July 1946; it was reckoned that the bathing suit would cause as much excitement as a nuclear bomb. This name was originally from German Bikini, the colonial name of the atoll as part of German New Guinea, and this was derived from Marshallese Pikinni.
etymonline
bikini (n.)
"low-waisted two-piece women's bathing suit," 1948, from French, coined 1947, named for the U.S. A-bomb test of June 1946 on Bikini, the Marshall Islands atoll, locally Pikinni and said to derive from pik "surface" and ni "coconut," but this is uncertain. Various explanations for the swimsuit name have been suggested, none convincingly, the best being an analogy of the explosive force of the bomb and the impact of the bathing suit style on men's libidos (compare c. 1900 British slang assassin "an ornamental bow worn on the female breast," so called because it was very "killing," also the figurative sense of bombshell).
Bikini, ce mot cinglant comme l'explosion même ... correspondant au niveau du vêtement de plage à on anéantissement de la surface vêtue; à une minimisation extrême de la pudeur. [Le Monde Illustré, August 1947]
As a style of scanty briefs, from 1960. Variant trikini (1967), with separate bra cups held on by Velcro, falsely presumes a compound in bi-.
