Daffy (adjective)

1. Being silly or crazy, in a playful or harmless way.
2. Acting in a way that is amusingly or annoyingly foolish or eccentric.

Origin:

The word "daffy" is likely derived from the daffodil, a yellow spring flower, which is said to have been used to describe someone who is cheerful and lighthearted.

Examples:

1. He's got a daffy sense of humor and always makes us laugh.
2. She's a bit daffy and always forgets where she put her keys.
3. He"s got some daffy ideas but they"re all in good fun.
4. She's a little daffy but we love her all the same.
5. He's always doing something daffy, like wearing a tutu to work.