At Starbucks I asked for venti with an extra shot. The barista called it a triple venti. What does the triple mean? I thought and a Google search confirmed that a venti comes with 3 espresso shots, so what does the triple refer to?
Refers to those shots of espresso. You have 2 in there by default. (The iced Venti drinks typically get 3, because the cup is a little larger (24 oz.))