the noise that babies make when they dont have anything else to do
My baby sister said googoo gaa gaa to me last night!
by Pinki June 02, 2006
A sound attributed to babies before they learn speech, although they may not actually make these sounds together. Sometimes said to babies as a way of mimicking their sounds.
"He hasn't spoken his first word, yet. All we get is googoo gaa gaa."
by Keith R January 27, 2007

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