ピーポーピーポーFreq.FrequencyTop 100,000Meanings1nounnee-naw; wee-wooonomatopoeic or mimetic wordMimetic word for the two-tone siren of an ambulance, police car, or fire engine in Japan.遠とおくでピーポーという音おとが聞きこえた。I heard a nee-naw sound in the distance.救きゅう急きゅう車しゃのピーポーが近ちかづいてきた。The ambulance's wee-woo was getting closer.