What does it mean "a while ago"? For how much time in the past it is said to be definite?
I saw it in the context of a video on Youtube (0:36)
Paraphrasing, the conversation was
Rakesh: Hi, Darren. Do you remember me? You took my sister out on a date. She's slightly larger.
Darren: Maybe. I think so. A while ago?
Rakesh: Yeah, it was a little while ago, right. I know, it's been a little while.