Yes, being pouty is a synonym for sulk. Both terms refer to displaying unhappiness or displeasure typically through sulking facial expressions or body language.
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nowie, bowie, pouty.
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pouty polar bears need a track with hills to win a race because
they live on hills
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A pouty expression typically indicates a sulky or dissatisfied mood. It is often characterized by pushing out the lips in a protruding manner, conveying unhappiness or disappointment.