GABBLING
Verb
gabbling
present participle of gabble
Noun
gabbling (plural gabblings)
Rapid, confused speech.
[…] I could hear nothing but a low gabbling; but at last the voices began to grow higher, and I could pick up a word or two […]
Source: Wiktionary
GABBLE
Gab"ble, v. i. [imp. & p. p. Gabbled; p. pr. & vb. n. Gabbling.]
Etym: [Freq. of gab. See Gab, v. i.]
1. To talk fast, or to talk without meaning; to prate; to jabber.
Shak.
2. To utter inarticulate sounds with rapidity; as, gabbling fowls.
Dryden.
Gab"ble, n.
1. Loud or rapid talk without meaning.
Forthwith a hideous gabble rises loud Among the builders. Milton.
2. Inarticulate sounds rapidly uttered; as of fowls.
Source: Webster’s Unabridged Dictionary 1913 Edition