Track Queen
A person that stretches before exercising or playing a sport in a very ostentatious or exaggerated fashion as a form of showing off his/her stuff.
Dude, you see that guy over there doing jumping jacks like he was going for the Guinness Book of World Records?" "Yeah, dude--he's a total track queen...and I'm sure he thinks that makes him such an awesome soccer player." "Yeah well we'll see on the field.