n. When an individual does not properly wipe his/her ass and leaves a shit stain in the underwear. Can result from sitting down and/or scratching the crack area.
The poo stains left in your underware. Caused by not wiping your ass, not wiping your ass enough, or having a bubbler or shart in the middle of the day. The appearance is similar to the starting area of a drag racing strip, or the "wheels down" area on a runway.
Husband: Sweetie pie honey bunny, these underware are going to need some "special" attention.
Wife: My god, whats up with the racing stripe?
Husband: Had a bubbler after my Taco Belllunch today.
When a man shaves his pubes so that they resemble a very thin line leading down to his sexual organs. The female counterpart is known as a landing strip.
Shelby: Hey dave, before I blow you, you're shaved right?
Dave: For the most part, but I do have a racing stripe