快かい楽らく殺さつ人じん者しゃ

noun

lust killer; lust murderer

Refers to a person who commits murder for sexual pleasure. A formal or criminological term.

• 快かい楽らく殺さつ人じん者しゃは、被ひ害がい者しゃを苦くるしめることに性せい的てき興こう奮ふんを覚おぼえるとされる。

  Lust killers are said to derive sexual excitement from inflicting suffering on their victims.