rap battle, n.All

A Rap battle is just two men reciting poems they wrote about each other

A Rap battle is just two men writing poetry about how strongly they feel about one another.

Rap Battle had an early Medieval Version of insult-trading in England called "Flyting".

The Vikings had their own version of rap battling called "flyting" which is "a ritual, poetic exchange of insults practised mainly between the 5th and 16th centuries"