To talk rapidly and continuously in a foolish, excited, or incomprehensible way

To produce sounds in a rapid, nonsensical way

बेतुकी आवाज करना

English Usage: The stream seemed to babble out as it flowed over the rocks.

Hindi Usage: जब धारा चट्टानों पर बह रही थी, तो वह बेतुकी आवाज कर रही थी।