A cock that is semi-hard but extremely red after repeated masturbation or a marathon sex session. Resembles a Penrose brand sausage.
Devon watched porn all weekend long and was working up a penrose after two days of repeated wanking.
by Eaton Holgoode July 2, 2009
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Working Up A Penrose
• Working it up
• Keep working and shut that guy up or we'll turn off the food stamps
• shut up, my one brain cell is working very hard right now
• 2 words, WAKE UP. And if you're in school, GET WORKING. And if you're like me, YEET ON!
• Wording up my fucks
• working class
• working from home
• working off
• working