語句
泛指會傷害人嘅妖魔鬼怪 evil monsters, demons, spirits, and ghosts in general; in ancient Chinese mythology 魑魅 ci1 mei6 is a monster that harms people in forests and rivers, and 魍魎 mong5 loeng5 is a demon of plague and misfortune
Definitions (Wiktionary)
phrase, idiomatic
the four demons chi, mei, wang and liang; demons and monsters of all kinds