What's a propeller-head coder?
I'm lampooning here somewhat but here goes :)
A propeller-head coder is seen as someone who is quite brilliant at developing software but often writes complex or 'clever' solutions that only they (or other propeller-heads) can understand.
PH: "See how I solved Euclids theory in Java in one line?"
Often the propeller-head is completely unaware that they are doing this and fail to see why other people just don't 'get it'. They can often get frustrated with people that 'can't keep up' and in turn people get frustrated with them as they are seen to be elitist and 'lording their intellectual superiority over others'.
YMMV a lot on this one.