wakipaiEtymologyBlend of Japanese 脇 (waki, “armpit”) + おっぱい (oppai, “boobs”). Compare oppai. First attested in 2020.wakipai means armpits, especially regarded as erotic. Lexicurio rates it Sui generis — a strength score of 95 out of 100.nounArmpits, especially regarded as erotic.“browsing Polka's art for reference. (sweat) all of them draws her hot.. her muscle tone, wakipai, sweat...”