1. A name for a professional who is completely incompetent in his field. (ie an accountant in rural Kansas)
2. A tiny penis.
That damned piss knuckle did my taxes, and now I'm being audited by the IRS.
or
My piss knuckle hurts when I pee.
A feral, disgusting, idiotic person. These people are completely incompitant and irritating. It is a drag to be around them. Suicidal thoughts may arise when around this person. They can also be associated with the word "ledmong"
and he was, a Piss Knuckle