Place it as the interruption in a reaction edit, right after the rambling setup and before the response beat. Follow it with a shut up mom clip for a second shutdown, or precede it with a confused reaction to build the back and forth before the payoff lands cleanly.
About this sound
This is a short voice clip of Horrid Henry delivering the Hindi line 'bak bak mat kar,' telling someone to stop blabbering. At just under five seconds, it lands as annoyed, cheeky and instantly funny, like a fed-up kid cutting off endless chatter. The line comes from the Horrid Henry television series in its Hindi dub.