juggle eggs
v. Performing a complex or difficult mental task which can't be interrupted for fear of losing the train of thought.

Example Citation:
"When he furrows his brow and places his arm straight with the palm facing forward out as though to ward off any interruption, I know he's busy juggling eggs."

The description of a complex task as seen in the SF book "The Mote In God's Eye":

"We juggle priceless eggs in variable gravity."

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