When a person who works in retail uses their job as an opportunity to workout by speed walking, lifting numerous heavy objects unnecessarily, or often times a combination of both. Sometimes they may go as far as wearing wrist or ankle weights to enhance their regimen. The majority of time they come across as a tweaking suckass by displaying an annoying amount of energy and eagerness to do things that normal people wouldn't want to do in the process making co-workers look bad or lazy.
Bob: Hey man, did you see Steve in electronics? I think he's been snorting coke on his break.
Terry: Na, he's just doing his retail workout.