Off one's trolley
形容人因年老而思维混乱、神志不清或行为古怪。
用于非正式场合形容老年人糊涂。
例句
The old man is off his trolley and often talks to imaginary friends.
典故来源
源自19世纪有轨电车，脱轨比喻精神脱离正常轨道。常用于描述老年痴呆或衰老导致的糊涂。