adj.腦筋不正常的；昏頭昏腦的
He has a dippy notion that the moon is inhabited. 他有一個(gè)愚蠢的念頭，認(rèn)為月球有人居住。
Having a picnic in such a raining day, certainly she is dippy. 她腦筋一定有問題，在這種下雨天還跑去野餐。
