"not on your life" I saw the sample conversation below. Man: Did Jane take your advise about going to the dentist for her cavities? Sometimes she can't sleep because of the pain in her teeth. Woman: Not on your life! What's "not on your life" ? I know the woman wanted to say that Jane didn't take woman's advise. but I'd like to know what do native English speaker image when they hear "not on your life". Is something on man's life ??