What does "blur" mean in slang?

Excuse me, could you possibly clarify something for me? I've been hearing the term 'blur' used in slang recently, and I'm not quite sure what it means. Is it a reference to something being unclear or out of focus, or does it have a more specific meaning in this context? Could you possibly provide an example of how it might be used in a conversation? I'd really appreciate it if you could help me out with this.