ETYM Perh. of Celtic origin; cf. Irish and Gael. fonn pleasure.
1. Activities that are enjoyable or amusing; SYN. merriment, playfulness.
2. Verbal wit (often at another's expense but not to be taken seriously); SYN. play, sport.
3. Violent and excited activity; (colloquial).

Entertaining.

To indulge in banter or play; joke