whacked out : 精神失常，非常疯狂的意思。

英文释义： completely insane very very crazy .

例句：

That girl is whacked out.

那女孩一定是疯掉了。

Don't get whacked out =Don't be crazy

别太神经质了，别太疯狂了，别疯疯癫癫的了。