1884, perhaps from daft (adj.), or from obsolete daffe "a halfwit" (early 14c.; mid-13c. as a surname). Compare late 15c. daffish "dull-witted, spiritless." With -y (2). Related: Daffily; daffiness.
权威例句
1. Daisy called her daffy, but goodhearted.
黛西说她傻乎乎的,但心肠很好。
2. That comedian sometimes acts a bit daffy.
那位滑稽演员有时行为古怪.
3. Kelly was acting daffy because she was so happy.
凯利高兴得发狂.
4. It is the sort of whooping glee that, in Daffy Duck cartoons, goeth before the fall.