Demented trolls are poking fun at one of the NYC shooter's victims this week ... saying a corporate real-estate executive got ...

One dreadful post referenced the infamous Luigi Mangione, accused of killing UnitedHealthcare CEO Brian Thompson on the streets of Midtown Manhattan in a targeted assassination on Dec. 4.

The alleged shooter, 26-year-old Luigi Mangione, was arrested at a McDonald’s in Pennsylvania on Monday and has been charged with second-degree murder, according to a criminal complaint in New ...

Mario Kart World has only just been released, but fans have already discovered a hilarious reference to the classic "Luigi Death Stare" meme that became so popular after its discovery in Mario Kart 8.