(adjective) Identifies the subject as noteworthy in some respect, but only for a select group of individuals; to others the subject is likely not even worth knowing, let alone being of any import.
Frequently used sarcastically to point out how irrelevant someone's opinion was to the conversation at hand.
Can be accompanied by an eyebrow arch and a chin stroke.
However, if used in the normal 'attention grabbing' sense, you are queer. 'Nuff said.
Guy 1: I had such a crappy day at work. My boss..
Guy 2: Dude, I played halo all last night.
Guy 1: Fascinating....Anyway, as I was saying..etc