Blah (interjection)

1. An expression of disinterest, boredom, or contempt.
2. Used to indicate that something is uninteresting or unimportant.

Origin:

The origin of the word "blah" is uncertain. it is thought to have originated in the early 20th century as a slang term to express a feeling of boredom or disinterest.

Examples:

1. She was so bored, she said "blah" and walked away.
2. The movie was so bad, all I could say was "bla.h"
3. He found the conversation to be "blah".
4. She said "blah" when asked if she would attend the meeting.
5. He said "blah" when asked how he felt about the news.