omnitasking 

To multitask on more than one operating system at one time.

It was hard to pay attention to the conversation when I was omnitasking by listening to music and word processing on the Mac, whilst chatting and image manipulating on Windows on the PC.

omnitasking by Challudym October 24, 2003

omnitasking 

To go beyond multitasking, to do basically the maximum of things at the same time.
Not necessarily only for IT systems; can be across any group of task.

"Man, I am overloaded! I am reading this manual, typing emails, listening to conference calls and telling my dog to stop chewing my slippers, while my mates are texting with me."
"You are omnitasking!"

omnitasking by UK-Fynbos March 13, 2020