Interesting how many different aspects of a mole exist - the Wikipedia disambiguation page lists
over 15 - plus the geographical areas and people called Mole ... .
My first thought when reading the poll was the pier.
An old friend of mine. We nicknamed him because he has terrible eyesight, a general hatred of direct sunlight, he's mostly a night person (nocturnal), and happens to love going cave spelunking... Admittedly most of those things are misconceptions about moles as animals, but nicknames like that tend to stick anyway. :-)
Just another Perl hooker - My clients appreciate that I keep my code clean but my comments dirty.