Comes from gasterbajter which was German for Turkish and Serbian seasonal workers that came to Germany to make their living. Gastos, nowdays, is a name for every Serb or Croat that is living outside of their homeland.
He thinks he's cool 'cause he's patriotic. What a gastos!
by ohyouknow July 02, 2005
Latino origin, means a dirty ass person who always wears the same clothes without washing them and just a generally dirty ass, non teeth brushin person.
Hey check out how Tommy's dressed! Fuckin gasto always wearing the same dirty ass clothes!
by MuthaFuckin D January 25, 2011