"blow your brains out" in Chinese (Simplified)
自杀（用枪打头）- 探脑袋（粗俗说法）
Definition
用枪射击自己头部自杀。这是非常强烈、直白且口语化的说法。
Usage Notes (Chinese (Simplified))
极为口语和直白，正式场合绝不适宜。有时夸张表达烦躁或无奈，但本意是指自杀。使用要非常谨慎，因为可能引起冒犯或心理不适。
Examples
He said he would blow his brains out if he lost his job.
他说如果丢了工作就会**崩了自己的脑袋**。
Never joke about wanting to blow your brains out.
千万不要开玩笑说想要**崩了自己的脑袋**。
In some movies, a character threatens to blow their brains out.
有些电影里，角色威胁要**崩了自己的脑袋**。
This math homework is so hard I could blow my brains out.
这数学作业太难了，我都想**崩了自己的脑袋**了。
If I have to sit through one more meeting, I’ll blow my brains out.
如果还要再开一次会，我都想**崩了自己的脑袋**了。
My friend always says he’ll blow his brains out if he has to eat broccoli again, but he’s just being dramatic.
我朋友总说要是再吃西兰花就要**崩了自己的脑袋**，但其实是在夸张。