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Jyutping bik1 dung1
Pinyin bì dōng

Definitions (粵典–words.hk)
  1. 動詞、潮語
    一人將​另一人​逼到​牆邊​,​面對​住​伸出​手掌​拍​喺​另一人​嘅​隔​籬​,​發出​「​咚​」​一​聲​嘅​動​作
    wall-smack
    壁ドン(かべドン)
Definitions (Wiktionary)
  1. verb, colloquial, neologism, of a man towards a woman, usually
    to put one's hand against a near wall (romantically or hostilely), creating a barrier with the arm and preventing someone from moving
  2. noun, colloquial, neologism, of a man towards a woman, usually
    the act of putting one's hand against a near wall (romantically or hostilely), creating a barrier with the arm and preventing someone from moving