The word "大腕" is formed by combining the character "大" meaning "big" or "great" with "腕" meaning "wrist", where "腕" is used metaphorically to represent skill or influence. It originated as slang in Chinese performing arts circles, referring to a star performer whose ability was so notable they were described as having a "big wrist", symbolizing substantial prowess or clout. The term later generalized to mean any highly skilled or influential person in various fields.