The performance was lacklustre.

The lacklustre of the performance disappointed the audience.

The wealthy family had many lackeys to attend to their needs.

The lackers are responsible for applying the final coat of paint.

He lacketh the necessary skills to succeed.

The lackbrains in the group couldn't come up with a solution.

He is such a lackbrain.

She performed lacklusterly in the competition.

Her lackadaisicalness was evident in her lack of motivation and enthusiasm.

Lackaday, I wish I had known about the event earlier.