BanterWatcher 

To observe a situation or act of banter.

Person 1: that was bantery
Person 2 : yes, pure banter
Person 1 : we are proper banterwatchers

BanterWatcher by Banterwatcher April 21, 2018

Banterwatch 

To observe whether a situation is banter or not subject to personal moral viewpoint

Person 1: was that comment banter or was it sexist?
Person 2: pretty sexist, that’s not banter
Person 1: thanks, good banterwatch

Banterwatch by Banterwatcher December 19, 2017