虐狗 [－－]

Jyutping joek6 gau2
Pinyin nüè gǒu

Definitions (Wiktionary)
  1. verb, literally
    to torture a dog
  2. verb, humorous, neologism, slang
    to torture the “single dog” (單身狗), i.e. to “torture” an unpartnered person by publicly displaying one's affection in a couple
    (syn.) 親熱, 秀恩愛, 秀恩爱, 亲热