adj. Boneriffic. Because of that priapism thing.
Real citation: "These aspects were clearly something that Caesariano in his Cosmo Vitruvius of 1521 did not understand, as his drawing shows an unresolved and literal draughting of the original flat man with his unfeasibly lengthy feet, hands and arms --not to mention his priaptastic penis."
(Johnny Rodger, 2005, The Drouth, http://www.thedrouth.com/article.php?id=121)
Made-up citation: "If I had a priaptastic woody lasting more than four hours, like they mention in the commercials, I'd either slam it in the window or audition for one of those commercials."