This term is used for things or people that are obviously Cuban. The term can be used in the same way as 'flaming' can be used for homosexuals. But instead of talking about the obviousness of someone's sexuality you are talking about the obviousness of someone’s culture. A synonym would be Cubanisimo (very Cuban, something a cuban would do.)
He's very Cubanaso...
That was very Cubanaso
Trashy cubans - the type that live in lower middle class neighborhoods in Miami. Christmas usually includes lechon in their driveways while they wear wifebeaters and drink bad american domestic beer, spout off ignorant statements and make the rest of the Cuban population look bad.
Hey did you see that cubanaso moved into our neighborhood? He had a couple lowriders and lechon going in the driveway. Wearing a wifebeater, too, que cubanaso.