你儂我儂 [－侬－侬]

Jyutping nei5 nung4 ngo5 nung4
Pinyin nǐ nóng wǒ nóng

Definitions (Wiktionary)
  1. phrase, idiomatic
    the intimate relations between man and woman; to bill and coo
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）