Ditz (noun)

1. A person, typically a woman, who is considered to be frivolous, scatterbrained, or lacking intelligence or common sense.
2. A person who is not very intelligent or is socially awkward.

Origin:

Slang word of uncertain origin.

Examples:

1. She was often called a ditz because of her airheaded behavior.
2. He was acting like a ditz and didn't realize what he was doing.
3. She was often called a ditz because of her forgetfulness.
4. He was a ditz and could never remember people's names.
5. She was a ditz and always needed help with her phone.