noun
a medical condition characterized by the enlargement of a man's breast tissue
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Gynecomastia is a medical condition characterized by the enlargement of breast tissue in males.
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Hey dude, did you know that gynecomastia is when guys develop man boobs?
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I heard that some guys get 'moobs' because of gynecomastia.
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His struggle with gynecomastia felt like carrying an invisible weight on his chest.