Which one is actually the "Best Movies of the year"?

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I believe that majority of us read newspaper, or read one or two magazines? Or maybe you still see those commercial from Television. When they promote a particular movies, they always has these acclamation about the film about to release in theater. They would either say "Two Thumbs up"; "The best movie of the year"; "New York times give it thumbs up", etc...... Almost every new movies you would see something like that. But actually, which one is the "Two Thumbs up" movie? I saw a couple of them, which they say the "best films of the year", but more like the opposite though.