一命归西

nà ge bǎo biāo yòng shǒu zhōng de gùn bàng jǐn jǐn yī jì měng jī jiù dǎ de tā nǎo dai kāi huā yī mìng guī xī

那个保镖用手中的棍棒，仅仅一记猛击，就打得她脑袋开花，一命归西。

The bodyguard dashed her brains out with a single blow from his club, which led to her death.