What do you English regard as a filthy habit?

What I had concealed completely was my reversion to a filthy old habit.

He was excellent company, however, despite his filthy habit.

Some want rid of tobacco, saying smoking is a filthy habit.

He had thought that even on Earth, the filthy habit had died out.

It's a filthy habit and you'll kill yourself the way you're going!

Despite his filthy habits, one must give him his due.

"I know all of your filthy habits," James said as he passed over a pocket humidor.

You will learn that you cannot bring your filthy habits to another city and hope to continue with them.

"It's about time you stopped that filthy habit, too," he said.