The crossword solution for the term 'STALLONE NICKNAME' is 'SLY' (3 letters). Sylvester Stallone, commonly known as 'SLY', is an American actor, director, producer, and screenwriter. He is well-known for his Hollywood action roles, including boxer Rocky Balboa in the Rocky series, soldier John Rambo in the five Rambo films, and Barney Ross in the three The Expendables films. His nickname 'SLY' is derived from his last name, Stallone.