The use of poor comebacks during an argument.
Person 1: "You're stupid"
Person 2: "So is your mum!"
Person 1: "Emergency Banter!!"
Posting a definition of "emergency banter" especially when all your banter is emergency.
Jim: *witty slander*
Rob: You can talk, 'big nose'.
Jim: Emergency banter there, Rob.
Rob: Posts definition of "Emergency banter" from Urban Dictionary.