gib·ber 
(jĭbər)
(jĭbər)intr.v. gib·bered, gib·ber·ing, gib·bers
To prattle and chatter unintelligibly.
n.
Unintelligible or foolish talk.
[Imitative.]
- overpay
- overpayment
- overpersuade
- overpersuasion
- overplay
- overplus
- overpopulate
- overpopulation
- overpower
- overpowering
- overpoweringly
- overpraise
- overprescribe
- overprescription
- overpressure
- overpressurization
- overprice
- overprint
- overprivileged
- overprize
- overproduce
- overproducer
- overproduction
- overproof
- overproportion