The line comes from Angels with Filthy Souls, the fictional gangster film Kevin McCallister watches in Home Alone from 1990, where the mobster Johnny delivers it after a shooting. Kevin later replays the scene to frighten intruders and delivery drivers, which helped turn the quote into one of the film's most quoted moments. Decades later it spread through YouTube edits, TikTok videos and soundboards, where creators reuse it as a tough, funny goodbye. Its Christmas connection and instantly recognisable gangster delivery keep it in circulation every holiday season.