Blah and Run-of-the-mill

Blah noun - Language, behavior, or ideas that are absurd and contrary to good sense.

Run-of-the-mill and blah are semantically related. In some cases you can use "Run-of-the-mill" instead an adjective "Blah".

Run-of-the-mill adjective - Being of the type that is encountered in the normal course of events.

Blah and run-of-the-mill are semantically related. Sometimes you can use "Blah" instead an adjective phrase "Run-of-the-mill".