More recently, these gestures are associated with movie reviews, having been popularized by critics Gene Siskel and Roger Ebert on their televised review show Siskel & Ebert — the thumb up meaning a positive opinion of a film; the thumb down meaning a negative one.
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The latter view was popularized by a widely reproduced painting by the 19th-century artist Jean-Léon Gérôme, whose Pollice Verso (usually known in English as "Thumbs Down") depicts a triumphant gladiator looking up into the stands for the verdict of the crowd.
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In 1992, only days after the release of Windows 3.1, it was discovered that the character sequence "NYC" in Wingdings was rendered as a skull and crossbones symbol, Star of David, and thumbs up gesture.