The "Fergie Fledglings" refer to a group of young players who were brought through the youth system at Manchester United under the management of Sir Alex Ferguson. This group of talented youngsters included players like Ryan Giggs, Paul Scholes, David Beckham, Gary Neville, and Nicky Butt, who went on to have successful careers at the club and became key members of the famous Manchester United team that achieved great success in the 1990s and early 2000s.