The phrase "second banana" is a colloquial term that refers to someone who is not the main focus or lead in a particular situation, often used in reference to comedy duos or partnerships. Some synonyms for "second banana" include sidekick, understudy, supporting actor/actress, assistant, co-pilot, wingman/woman, second fiddle, and deputy. Each of these terms conveys the idea of playing a secondary role to someone else, whether on stage, at work, or in everyday life. While being a second banana may not always be the most glamorous position, these individuals often provide crucial support and contribute to the success of the team or project they are a part of.