aja675 wrote:
...Just 'cause they're not interested in something that someone has to say?
Depends on the tone and context (obviously).
It can be used jokingly and in a non-harmful manner, but it's pretty obvious when it's meant that way.
If you're good friends with the person and they know it won't effect you, they might bluntly tell you that nobody cares. That can be for various reasons.
However, more often than not, people say it with malicious intent. The statement is intended to make you question whether people actually do care; to destroy relationships by taking advantage of your insecurity. They dislike listening to you and would like you to stop.
Alternatively, it can be used as a quick and simply means to make someone stop talking. The intent isn't malicious, they would simply like you to stop talking.
It's difficult to say exactly what they mean, but in most cases it translates to, "I dislike your voice and/or conversation, and would like it to stop."