a) A highly sophisticated Hellenic culture during the classical era of European history. Produced Plato, Socrates, Aristotle, Pythagoras, Archimedes (in the then Greek colony of Sicily), Diogenes, and eventually Alexander the great. Also the inventors of Democracy. They spoke a vibrant language that is still studied today in order to read their beautiful poetry and profound philosophy.
b) A group of hairy, backwards thinking male chauvinists and large, overprotective mothers who insist on reminding their children twice a day that "there are only two kinds of people, those who are Greek and them that wish they was Greek' which they probably stole from 'My Big Fat Greek Wedding' which by the way is one of the 4 to 9 films they’ve ever watched.
Me: “Sure, how bout that new Spielberg film”
Greek friend's mother: (suddenly appearing from behind a corner and telling us in a wise voice and completely without precedent) “There are only two types of people, them that are Greek and them that wish they was Greek.” (Greek mother returns to her moping as Greek father returns home from his job at Parthenon Plumbers or whatever pseudo-classical name he's given his place of business and demand his lunch.)
Used as a slang term for anal sex.
Used to express your lack of knowledge of a certain topic.
I was with a girl last night and she wanted me to do it Greek with her.
Everything you're saying is Greek to me.
Although there are large amounts of Greeks/Cypriots in Australia and parts of South Africa as well as the UK.
Greeks have many cultural similarities to Italians, and conquered Sicily and most of Southern Italy. Greeks are loved all over the world apart from in Turkey, where they are so jealous of them.