A subject which you don't care about, but which a friend finds interesting and always wants to talk about.
Often the speaker doesn't realize or doesn't care that others are less interested than the speaker.
Crose originated as Crows. A person, Bryce B., would often talk about the unique aspects of crows to the boredom of his audience. As this is being written, he continues on his quest of educating the world to the supposed "awesomeness" of crows.
Robert: World of World craft, blah blah blah, epic drop, blah blah blah, rep points, blah blah blah.
Gabe: I don't care, quit talking about crose.
Paul: Eve Online, blah blah blah corporation, blah blah blah Pyroxeres blah blah blah, gate camp, blah blah blah.
Gabe: I don't care, quit talking about crose!
Bryce: Crows, blah blah blah, crows, blah blah blah blah, crows, blah blah blah.
Gabe: I DON'T CARE! QUIT TALKING ABOUT CROSE!
Gabe: Weezer, blah blah blah, Pinkerton, blah, blah, blah, Rivers' guitar pick, blah blah blah.
Robert, Paul and Bryce: We don't care! Quit talkin about crose!
someone who always has to one-up any story that has just been told. also extremely annoying and cocky. all around dooshbag.
Me: Dude, I just got 5 headshots on that map.
Jeff: I got six the other day.
Me: Dude, you just crosed me! what the hell man.