He had a nervous habit of giving me irrelevant information.

A nervous habit she'd developed in the last few days.

It was a nervous habit left over from childhood that only emerged in times of great stress.

He could tell from the frayed material that this was a nervous habit.

In fact, it's the most common type of "nervous habit."

At times like these, though, she needed a nervous habit to fall back on.

It has been described as a nervous habit- a form of fidgeting.

Perhaps originally a nervous habit, he's worked it in as part of his act.

She was biting her lower lip, a nervous habit that she'd been trying to break herself of for ten years.

But it did not stay that way; Dave's hired man had the nervous habit of work.