Patrick Bateman is the wealthy New York investment banker at the centre of American Psycho, the 2000 film based on Bret Easton Ellis's novel, played by Christian Bale. His forced, charming laugh has become shorthand online for performative politeness hiding something darker, and short clips of his dialogue are widely shared on soundboards and in meme edits. This particular laugh, paired with the casual martini request to Paul, is used because it condenses that character into just a few seconds: expensive taste, smooth manners and an unsettling edge.