French entertainer who performed as a mostly nude Greek god during opening ceremony responds to controversy

I'd say that Borat mankini is mostly nude.

There is some old greek (IIRC) story where some woman should come not at day, not at night, not clothed, not naked (and something more I don't remember, not walking, not being carried?).

She went in the sunrise draped in a fishnet.

He had a costume that mimicked nudity and was singing a song about being nude (something about, if we were all nudes, there will be no wars). So i guess the description mostly nude applies here.

That depends a lot on what your culture says counts as nude. The technical term would only apply if they were completely nude, but a bikini may well be considered nude in certain parts of the world where showing hair is considered degenerate by some.

Hell I'd have difficulty defining nakedness myself... to stay with the bikini example, depending on skimpiness it leaves nothing to the onlooker's imagination. It might as well be a simple layer of color over the intimate regions instead, and then we are essentially talking bodypaint which I would say definitely qualifies as nude in my book, but probably not in a lot of other people's.