Flyting

1545 woodcut by Lucas Cranach referencing (and possibly illustrating) flyting. German peasants respond to a papal bull of Pope Paul III. Caption reads: "Don't frighten us Pope, with your ban, and don't be such a furious man. Otherwise we shall turn around and show you our rears."
The Norse gods Freyja and Loki flyte in an illustration (1895) by Lorenz Frølich.

Flyting or fliting (Classical Gaelic: immarbág, Irish: iomarbháigh, lit. "counter-boasting") is a contest consisting of the exchange of insults between two parties, often conducted in verse.