RichPenny, does what it says on the tin.
Knottie makes sense.
Sharki I have a sneaking suspicion that his is fairly apt as well.
My favourite is cinnamon_girl, especially after reading the lyrics the other day.
However. Old Fart. Wrong!! Should be youngnfunky. Or maybe combatsboi.
Captain_bastard. Wrong!! Maybe Capt_Smiley.
Don't be self-fulfilling prophecies, chaps. Change them names.
While I'm on the subject, micarms sounds like a pub, and who or what does lunge lunge at.