Definition
Behaving in an extremely unusual or irrational way; acting very foolishly or irresponsibly.
发神经
He spent all his money on lottery tickets; I think he's completely off his trolley.
他把所有的钱都花在彩票上；我觉得他完全疯了。
You can't just quit your job like that; you must be off your trolley!
你不能就那样辞职；你一定是疯了！
She looked completely off her trolley in that bizarre outfit.
她穿着那套怪异的服装看起来完全疯了。