Blon Fel-Fotch Passameer-Day Slitheen addressed Captain Jack Harkness as fly boy when she ordered him to give her the extrapolator while threatening Rose Tyler. (TV: Boom Town)
Donna Noble addressed Arnold Golightly, a wasp-shaped Vespiform, as "fly boy". (TV: The Unicorn and the Wasp)
Shortly after meeting, Gwen Cooper addressed CIA agent Rex Matheson as "fly boy". (TV: Rendition)