tracks

hair extensions that are glued onto your scalp, so called because the base crisscrosses like train tracks

n. - needle marks caused by IV drug use
n. - a portion of drugs, usually a $10-20 vial of crack cocaine or heroin. Likely derived from the practice of splitting an ounce (brick) of cocaine into 8 portions (eighth or 8 ball), much like an album has around 8 or so songs, or tracks.
n. Street or streets where prostitutes stroll, looking for customers

Multiple songs on a CD, album, ipod, or MP3 player, etc. Each singular song is a "track" and more than one cut are "tracks."

scars caused by injecting drugs

A brand of shoe that used to be sold at old K-mart fall apart back in the day,the 70's and 80's. If one had these shoes your buddies would make fun of you because they were not cool like name brand shoes,Nike, Addias or what ever.These shoes were the type your parents bought you if they were cheap or on the welfare.
They had some cool styles,running type with green suede and yellow stripes.
K-Mart no longer sells these type of shoes,what a shame.

These shoes had their own school yard song.
Tracks make your feet feel fine! Tracks only a nickel and a dime!

Braces (like orthodonty, in one's mouth)

the word tracks (alt. trax) can be used synonymously with the word "plan(s)," but "tracks" sounds more sick-nasty, bro.

you can also use "tracks," as confirmation of plans:

"I'll see you at 7?"
"Okay, tracks."