A Big Gulp is a soft drink bigger than your head. A Slurpee is a frozen "slushy" variant of the same.And what pray are 'Slurpees', 'Big Gulps' and 'tamales'? They sound like fodder for those with no table manners
A tamale, however, is a traditional Mexican food item consisting of ground corn "masa" around a filling, wrapped in corn husk and steamed to readiness. Very good and you should try some when you can.