In one of those ways in which the web is just pretty awesome, not one but two german planet readers emailed me to tell me that the word is not arschegeiger, but arschgeige. This would explain why I got like 10 google hits for arschegeiger and now 3720 for arschgeige. I think this is the best hit I’ve found for it so far, just in terms of both utility and pure bizareness, and because now arschgeige is in his logs.