Dutch for "manga murder" (found on Wikipedia)
Teen: DUDE! My friend's running around with a cleaver knife!
Manga-addicted Pre-Teen: Did he read a manga known as "When the Higurashi Cry"?
Teen: Yeah... I remember seeing him reading that... why?
Manga-addicted Pre-Teen: HAAAH... what Mangamoord!
Teen: What the hell does that mean?
Manga-addicted Pre-Teen: It means "manga murder" in Dutch, you fucking idiot.