Definition of "flyting"

Rival poets in Scotland exchanged flytings that were packed with riddling conceits.

2007, Marina Warner, “Doubly Damned”, in London Review of Books, 29:3, p. 26

These "flytings" consisted of alternate torrents of sheer Billingsgate poured upon each other by the combatants.

1898, George Saintsbury, A Short History of English Literature