孖叉 [－－]

Jyutping maa1 caa1
Pinyin mā chā

Definitions (粵典–words.hk)
  1. 動詞
    屌​鳩​既​借代​詞​，​源​於​文章​過濾​粗口​時所​轉用​既​「​Ⅹ​Ⅹ​」
    A verbal substitution for "fuck", originates from the "X" used in news censorship for vulgar; literally: double cross.