"See about a girl."
Sean tells Will the story of how he meet his wife, missing an important Red Sox game to talk with her, telling his friends "I have to go see about a girl." In the final scene of the film, Will throws away his job to reunite with Skylar, leaving Sean a letter requesting he tell the professor, "I had to go see about a girl." After reading this, Sean says "Son of a bitch. He stole my line."