Henry - well done, sir! :) I missed that in skimming through Nigel's link. However! My caution remains - it's proof that the word is a word. There's nothing to link it to weaving, except the convenient rhyme with shuttle...

Ray - No, it's not. Besides the fact that the evidence is there that guttle is a word in its own right,

I know I can guttle when I hear me shuttle go
Poverty poverty knock

makes absolutely no sense whatsoever in your translation of

I know I can go until when I hear me shuttle go
Poverty poverty knock