crack-track
The imprint that is left on the back of a toilet seat by someone (usually a fat ass) who has not been diligent in wiping. The combination of sweaty ass-crack and residual shit results in the depositing of a brown streak on the toilet seat. Most commonly found in public restrooms.
Man, I really had to take a dump this morning, but someone had left a crack-track in the first stall. So I moved on down the line.
crack tracking
Verb: 'Crack Tracking', the term is used to describe someone smuggling crack across state borders.
Define: I wonder if that sketchy looking cunt who is filling up their car at that servo is Crack Tracking?
crack track
The vagina and anus crack together forms the crack track.
I was feeling up Jan last night and started from the top of her pussy and went right under to the top of her ass. I touched her whole crack track.