Songwriters are asked to submit the lyrics to their songs when they get published, so we can see that Melvins lead singer Buzz Osborne is singing lines like "Lost icka toe rest, might like a sender doe ree" and "You sink my swan, rolly get a worst in" on this track (either that or some pour soul at their publishing company had to interpret them).
The words are mush, but can be interpreted in some kind of existential way if you think hard enough. Osborne, however, didn't have anything deep and meaningful in mind, but insists that they are real words. He told us: "Believe it or not, those are actually lyrics, even though it sounds like nonsense. I'd left the lyrics at home and I couldn't for the life of me remember exactly what they said. I remember that day I was recording the vocal, I had to drive all the way back to my house and get them. I thought that was pretty funny." (Here's our full Buzz Osborne interview