"jerk off" in Chinese (Simplified)
打手枪 (粗俗)手淫
Definition
粗俗和非正式的说法，意思是手淫，通常指男性。有时也作侮辱用语，表示“蠢货”。
Usage Notes (Chinese (Simplified))
这是极为粗俗和冒犯性的用语，仅限非常私密或同龄男性朋友间的玩笑。作侮辱时相当于骂人“蠢货”。不要在正式场合使用。
Examples
He always jerks off before bed.
他睡觉前总是会**打手枪**。
Do not jerk off in public places!
不要在公共场所**手淫**！
Some boys start to jerk off when they are teenagers.
有些男孩在青春期开始**手淫**。
Stop being such a jerk off and help us out!
别当**蠢货**，帮帮我们吧！
Whenever he's bored, he just goes to his room to jerk off.
他一无聊就会回房间**打手枪**。
Some guys brag about how often they jerk off, but no one really cares.
有些男生还会炫耀自己**打手枪**多频繁，其实没人关心。