happy little accident

1. you made an accident and you are happy with it
2. your parents accidentally created you and they don't want you. But you're still happily depressed.

1. person 1: oh shit, i made a mistake but I'm fine with it.

person 2: then you made a happy little accident
2. mother: we created you when we were drunk and having sex

father: you're an orphan we don't want you.

you: fine...then I'm a happy little accident.