Runway

The skin inbetween the anus and the balls or vagina

i just licked her runway

Runway

taking a line of cocaine down the sternum of topless girl with a body shot at the end, causing you to take off the runway

R. Kelly: Hey man, let's do these runways already.
Castro: The girls are already set up on the bed.
*R. Kelly takes runway*
R. Kelly: Damn man, I feel good!

dirty runway

When a man has anal sex with a woman, then titty fucks her leaving a skid mark between the breast.

Hey Dude, did you fuck your wife in the ass, then titty fuck her leaving a dirty runway?