A babyish voice babbled merrily, but the sounds were all "goos" and "ahs" without any resemblance to words.
Lydgate copies this line in his Hors, Shepe, and goos, l. 155.
“That fare to be my train,” I says to myself, and drinks my beer as quick as I can and goos acrost to the station again.
So Gg.; rest The goos, the duk, and the cukkowe also (wrongly; see next line).
[perhaps sound symbolism, influenced by glue; perhaps fr bur-goo, ''oatmeal porridge'']