If you’ve ever bought a car, you know the feeling when you’ve signed all the paperwork, driven off the lot, and think, “Wow, this is my car now.” "I was excited," says Courtney Johnson.

Enter the FAFO parent. The slang acronym, which may have started in the motorcycle gang community, means, “f--- around and ...

When you step back and think about it, yo-yo dieting makes sense in how you could get stuck in the pattern. You’ve been “successful” losing weight, so you feel confident you can do it again.

If you've ever bought a car, you know the feeling when you've signed all the paperwork, driven off the lot, and think, "Wow, this is my car now." "I was excited," says Courtney Johnson.

It's called a yo-yo sale because they pull you back after you've already bought the car. NPR sent a survey to consumer attorneys who work on auto cases; 40 of them responded.