nutty as a fruitcake
疯疯癫癫的
口语·幽默形容人疯狂或古怪
英文释义
to be crazy or eccentric
例句
My uncle is nutty as a fruitcake, but we love him anyway.
典故来源
水果蛋糕中常含坚果（nuts），而nuts在俚语中意为“疯狂”，故以此比喻人行为古怪。