下毒手 [－－－]

Jyutping haa6 duk6 sau2
Pinyin xià dú shǒu

Definitions (Wiktionary)

verb
to duplicitously kill or attack (a person).
verb
to betray or frame (a person) in an atrocious manner.

下毒手 [－－－]

Jyutping
Pinyin xià dú shǒu

Definitions (CC-CEDICT)

to attack murderously
to strike treacherously