adj.脑筋不正常的；昏头昏脑的
He has a dippy notion that the moon is inhabited. 他有一个愚蠢的念头，认为月球有人居住。
Having a picnic in such a raining day, certainly she is dippy. 她脑筋一定有问题，在这种下雨天还跑去野餐。
