What is Kelly Holmes?
1.
A person with a substantial level of knowledge and experience in the field of athletics and/or keeping fit.
Derives from the athlete Kelly Holmes, a British Olympic gold-medalist; usage popularised by the character Lauren from the
Gym instructor: You're going very slowly on that treadmill.
Lauren: What do you know, are you Kelly Holmes?
Gym instructor: No, but...
Lauren: Are you Kelly Holmes?
Gym instructor: I'm only trying to hel...
Lauren: Are you Kelly Holmes?
Gym instructor: Just let me show...
Lauren: Are you Kelly Holmes?
etc
See