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Jyutping hing1 hing1 ngo5 ngo5
Pinyin qīng qīng wǒ wǒ

Definitions (CC-CEDICT)
  1. to bill and coo (idiom)
  2. to whisper sweet nothings to one another
  3. to be very much in love
Definitions (粵典–words.hk)
  1. 動詞
    情侶​之間​言​談​或者​行為​顯得​親暱
    to be romantically affectionate; to say loving words to one another; to bill and coo; literally: you you me me
    • 拍緊拖嘅男女梗係卿卿我我啦!
      拍紧拖嘅男女梗系卿卿我我啦!
      paak3 gan2 to1 ge3 naam4 neoi5 gang2 hai6 hing1 hing1 ngo5 ngo5 laa1!
      Dating couples will of course behave in an affectionate manner.
Definitions (Wiktionary)
  1. phrase, idiomatic
    whispers of love; lovers' talk; to bill and coo; to be very much in love; intimate relations
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    拍紧拖嘅男女梗系卿卿我我啦!
    拍緊拖嘅男女梗係卿卿我我啦!
    paak3 gan2 to1 ge3 naam4 neoi5 gang2 hai6 hing1 hing1 ngo5 ngo5 laa1!
    • Dating couples will of course behave in an affectionate manner.