Noun. One who incrementally improves another's already superior performance by virtue of their own highly competitive, however slightly inferior performance.
Jean Girard, Talladega Nights: NO! I will battle you with the entirety of my heart, and you will probably lose, but maybe, juuuust maybe, you might challenge me. God needs the Devil. The Beatles needed The Rolling Stones. Even Diane Sawyer needed Katie Couric. Will you be my...Katie Couric?
Ricky Bobby: Wow. chuckles
I feel like I'm in Highlander.