I used to think it was 'expresso', but my snobby friends corrected me. It is 'espresso'. It is a small cup of coffee, highly concentrated, made by shooting steam through coffee grounds. It'll wake you up in a hurry. If you use a plastic spoon and it doesn't melt in the cup, it's not true espresso. ;-) For more information: 'http://en.wikipedia.org/wiki/Espresso