Espresso con Panna: A variation of the macchiato by substituting a dollop of whipped cream for the milk froth. Basically a Starbucks invention. Means in Italian "espresso with cream”.
Espresso Lungo: American term where a shot is extracted longer for a bit of extra espresso. Tends to maximizes the caffeine but will mostly produce a more bitter cup.
Espresso Romano: Espresso served with a lemon peel on the side. Whilst not a typical accompaniment in Italy it is commonly served with the espresso beverage in America.