cheekini/t͡ʃiːˈkiː.ni/EtymologyBlend of cheek + bikini; see bikini briefs.cheekini means A style of women's briefs covering only part of the buttocks. Lexicurio rates it Sui generis — a strength score of 90 out of 100.nounA style of women's briefs covering only part of the buttocks.