Lampwick was Pinocchio's misbehaving friend in the Disney film. He persuades pinocchio to go to Pleasure Island with him and after weeks of all fun with no studying or chores they turn into a pair of little donkeys!
Lampwick is a good name for someone who's acting like a complete Jackass.
'Christ, Tim is such a Lampwick!'
'I had to come outside to get away from that guy! He's such a Lampwick i'm surprised he doesn't have a tail!'