Run-of-the-mill (adjective)

1. Ordinary or average in quality or nature.
2. Not special or outstanding in any way.

Origin:

The phrase comes from the practice of using a mill to grind grain, and the phrase "run-of-the-mill" originally referred to the grain that was ground after the better quality grain had been selected. the phrase then came to refer to anything that is typical or average.

Examples:

1. The hotel was run-of-the-mill and didn't have any special amenities.
2. The movie was just run-of-the-mill and didn't offer anything new or exciting.
3. It was just a run-of-the-mill day at the office.
4. His performance was run-of-the-mill and did not stand out.
5. The meal was run-of-the-mill and nothing special.