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 Bell lunch 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
while going down on a woman you puke from her vagina all the way up to her chin. Thus giving the appearance of a racing stripe going from her vagina to her chin.
I was feeling sick when I was eating out my girlfriend, and I ended up giving her a racing stripe.