simple: breakfast, lunch, and dinner combined.
"dude, i had no time to eat before work today, and you know the bastards at work wont let me eat on the job. when i came home i ate brunchinnner to compensate for all those lost calories."
your typical brunchinner dish would constist of ground chuck beef, lettuce, and oatmeal, all mixed in one bowl and topped with ketchup, bananas, and balsamic vinegar. mmm.