Share prices have been erratic this last month.

Fadil's behavior was becoming more controlling and erratic.

Mary was troubled by Tom's erratic behavior.

Yanni used his erratic behavior as a way to blackmail Skura.

Dan began an erratic sexual relationship with his youngest aunt, Linda.

Tom began to behave erratically.

Yanni was behaving erratically towards Skura.

Yanni became aware of his erratic behavior.

Sami's behavior was becoming more controlling and erratic.

He is erratic.