This male is a cousin of Amy Farrah Fowler.
He had been paid to take Amy to her high school prom, but used the money to buy drugs instead as told by Amy in "The Pulled Groin Extrapolation". Later, Amy discloses in "The Prom Equivalency" that she was assigned to the prom clean up crew and did have one dance with her mop while the DJ was finishing up. Her song was "The Lady in Red". Finally, Sheldon does take her to the prom that Amy and Bernadette arranged on the roof of their apartment building to make up for what her cousin did.