n :  an abnormal, more or less persistent, and often painful erection of the penis : esp  :  one caused by disease rather than sexual desire
 
Pri•a•pus Greek mythological character. A god of gardens and fertility, Priapus was the son of Aphrodite, who disowned him because he had a grotesque little body with a huge penis. He was a member of the retinue of the god Dionysus and chased after nymphs.
 
 
 
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