Simple past tense and past participle of chatter.(verb)
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Use "chattered" in a sentence
"Before I could demand clarification, the nurse called his name and chattered loudly as she rolled him out of sight, leaving me with more questions than answers."
"“It looks like something just kind of chattered its way down along that edge,” deputy shuttle program manager LeRoy Cain said at a briefing, showing a picture of unidentified debris that hit the ship 104 seconds after liftoff."
"She noticed he was smiling, and laughed and chattered on about her mother and her grandmother and being a nurse."