Third-person singular simple present indicative form of gibber.(verb)
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Use "gibbers" in a sentence
""Would you like some tea?" she quavers, desperately trying to ignore the profound threat embodied by the other, but her evasions soon fading into ineffectual squeaks and gibbers."
"He gibbers on like an idiot while processing a plan and somehow finds the right, most powerful words to say."
"The stork-like Mr. Abele hunches and cowers; he gibbers his text softly, almost breathlessly; Mr. Sales puts up a little more of a fight with his youthful, higher vocal range, but he too lies down to die."