bi·ki·ni 
(bĭ-kēnē)
(bĭ-kēnē)n. pl. bi·ki·nis
1.
a. A very brief, close-fitting two-piece bathing suit worn by women.
b. A very brief, close-fitting bathing suit worn by men.
2. often bikinis Brief underpants that reach to the hips rather than to the waist.
[French, after Bikini.]
bi·kinied (-nēd) adj.