s ludicrous, foolish
s informal or slang terms for mentally irregular
a. 古怪的
1. The children's party had a wacky theme with crazy hats and colorful decorations.
这个孩子们的派对有一个古怪的主题，配有疯狂的帽子和五颜六色的装饰。
2. My friend has a wacky sense of humor that always makes me laugh.
我朋友的幽默感很奇特，总是让我笑。
3. We watched a wacky movie that had the most unusual characters and funny situations.
我们看了一部古怪的电影，里面有最不寻常的角色和有趣的情节。