Most often when i excitedly read a Melvins tracklist for the first time, you will find me rolling my eyes a little.
I'm guessing you don't rate Piss Pisstopherson as a song title then?

Putting the low brow humor aside I think it's probably got more to do with having so many songs that they probably can't be fucked thinking up decent names for them, I even get that feeling a bit from their album titles.
Buzz: "What should we call album number 25?"
Dale: "Yeah eh um how bout Polka Dot Sledgehammer?"
Buzz: "Done. But I'm choosing the name of the next one in six months time"
Dale: "Whatever"
In saying that The Asshole Bastard is an awesome name for a song title. My mother's boyfriend is an old school Italian fella who gets worked up pretty easily and when he starts ranting about politicians or public servants he always refers to them as asshole bastards. They're not just assholes and they're not just bastards they're asshole bastards. I'm sure I remember Buzz in the 51 shows in 51 days tour diaries calling the government officials who came up with some train line in LA to the airport as asshole bastards too.