noun
persiflage
PUR-si-flahzh/ˈpɜːrsɪflɑːʒ/
Light, teasing conversation.
Their friendly persiflage keeps the mood light during lunch.

Etymology
The verb for “whistle” or “hiss” underlies a French verb meaning “to banter.” Persiflage names that bantering activity: light, teasing conversation or a playfully unserious treatment of a subject.
More examples
- She enjoys a little persiflage with her coworkers.
- The meeting begins with persiflage before turning to serious business.
- Beneath their persiflage, the two old friends share a deep affection.