I'm gonna break your nico nico kneecaps
A weeb or otaku warning you that they're about to take you down so hard, your kneecaps will start crying.
You ruined my playlist, so I'm gonna break your nico nico kneecaps.
You said my anime was bad, so I'm gonna break your nico nico kneecaps.
You skipped my favorite character, so I'm gonna break your nico nico kneecaps.