Jibber jabber is Incoherent and unintelligible rapid speech often in
slang or patois. Used in the
UK as a disparaging
name for other languages such as French, Spanish or American.
“It was all jibber
jabber. Couldn’t understand a dam’ word the wretched feller was sayin’,
Jeeves.”
“But, Milord, he was an American.”
“
Yes?”