The people, or anything pertaining to those of South Asian/Middle Eastern Decent.
Because of the many countries that litter South Asia and the Middle East, the term 'brown' is used in teenage circles as a blanket term. (One thing in common of people of these origin is their brownish-reddish-tan skin.)
Not a racial slur. (in most cases)
"That kid isn't spanish--he's BROWN."
"I'm going to the mall with all my brown friends."