on again, off again

on again, off again

Irresolute; wavering in certainty or constancy; inconstistent. Commitment from the board regarding the merger of the two companies has been on again, off again since the plan was first proposed. Mike and I were pretty serious for about a year, but our relationship has been on again, off again ever since we graduated.
See also: again, off, on

on again, off again

 and off again, on again
uncertain; indecisive. I don't know about the picnic. It's on again, off again. It depends on the weather. Jane doesn't know if she's going to look for a new job. She's off again, on again about it.
See also: again, off, on