A word used to describe silly or nonsensical speech, often used to imitate baby talk or foolish sounds.
Origin uncertain, possibly onomatopoetic (imitating sounds). The reduplication of 'gu' creates a playful, childlike quality similar to other reduplicative words.
Words that repeat sounds like 'gugu,' 'googoo,' 'gaga' appear in nearly every language as ways to talk about babies—linguists call these 'reduplicatives,' and they're some of the oldest words humans use because even ancient people used these sounds with infants!
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