ボインぼいんFreq.FrequencyTop 50,000Meanings1nounbig breasts; big boobsslangSlang term for large breasts; often used in casual or vulgar contexts. Can be considered crude.あの女じょ優ゆうはボインで有ゆう名めいだ。That actress is famous for her big boobs.2adverb, adverb taking the 'to' particleboing; sproing; powOnomatopoeic adverb for a springy, bouncing sound or impact. Often used with と.
