noun
sexual relief; masturbation
Colloquial term for relieving sexual tension, often referring to masturbation.
彼は性処理のためにアダルトサイトを見る。
He looks at adult sites for sexual relief.
性処理の方法は人それぞれだ。
Methods of sexual relief vary from person to person.
オナニー is a common loanword for masturbation, more direct and less euphemistic than 性処理.
Compound of 性 (sei, 'sexual') and 処理 (shori, 'processing, handling').