"Teflon Don" is a nickname for John Gotti, a notorious American mobster who led the Gambino crime family in New York City during the 1980s. He earned this moniker because charges against him seemed to slide off without sticking, much like Teflon. Gotti was known for his flamboyant lifestyle and public persona, which made him a media sensation. Despite multiple arrests and trials, Gotti managed to evade conviction for many years, showcasing his influence and power within organized crime. However, in 1992, he was finally convicted on charges of murder, racketeering, and other crimes, leading to a life sentence in prison.