Definitions by Track Star

500 pace 

running at a pace suitable for 1 and 1/4 laps around a track; generally very quick

Jordan ran a 500 pace that was never seen in the history of track.

500 pace by Track Star March 7, 2005

McShitmuffin 

McDonald's standard breakfast fare

"Hi, welcome to McDonald's, can I take your order?"
"Yeah, gimme a McShitmuffin..."
"Do you want fries with that?"
"Fuck off."

McShitmuffin by Track Star November 28, 2004