Anyone know what this is called?

[errole]

I am trying to figure out what is that brown strap on the dancer of just dance.

Fine China - Just Dance Wiki

 

[Laura Knotek]

It looks like the straps from a shoulder holster (minus the holster, firearm, and any ammo case).

 

[snowmutt]

Love the "Miami Vice" picture.... just had a flashback to when Don Johnson made unshaven look so freaking cool.