Definition
Behaving in an extremely unusual or irrational way; acting very foolishly or irresponsibly.
發神經
He spent all his money on lottery tickets; I think he's completely off his trolley.
他把所有的錢都花在樂透彩券上；我覺得他完全瘋了。
You can't just quit your job like that; you must be off your trolley!
你不能就那樣辭職；你一定是瘋了！
She looked completely off her trolley in that bizarre outfit.
她穿著那套怪異的服裝看起來完全瘋了。