Richie Tozier, nicknamed "Trashmouth," is a main character in Stephen King's It, known for his crude humor, impressions, and role as the witty but deeply emotional heart of the Losers' Club, who fights the evil clown Pennywise in Derry, Maine. He's portrayed as a talented DJ as an adult and becomes a crucial, brave member of the group, often using his jokes as defense, with recent adaptations highlighting his unrequited love for fellow Loser Eddie Kaspbrak, adding depth to his character.