The term CORP. KINGPIN is used to describe a powerful executive in a corporation. The two crossword solutions for this term are EXEC, which stands for executive, and CEO, which stands for Chief Executive Officer. An executive is a high-ranking corporate officer who is responsible for managing the day-to-day operations of a company, while a CEO is the highest-ranking executive in a company and is responsible for making major decisions that affect the entire organization. Therefore, a CORP. KINGPIN is an executive or CEO who has a great deal of power and influence within a corporation.