NoBigWillie is the name used by a male love-meet.net user in Grand Theft Auto IV and its expansions. No matter how many times the player contacts him, he will never date him. His name is a crude sexual reference for a short penis.
He has a striking resemblance to Darren Covey of Algonquin's Most Wanted list. It could mean NoBigWillie's real name is Darren Covey.