Top Definition
1)A medical syndrome in which the penis has worn out with the passing of time.
The skin of the penis may sometimes become floppy, wrinkly, and will often appear dry.
2)A penis that can no longer attain an erection, due to old age or over use.
Word origin: decrepit and penis
"Professional slut: I fucked an old guy yesterday for a business promotion; he had a real nasty decrepenis."
"Doctor: I'm afraid you have been diagnosed with Decrepenis syndrome"
by Mr Weegels September 26, 2006

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