:juggling eggs: vi. Keeping a lot of {state} in your head while
modifying a program. "Don't bother me now, I'm juggling eggs",
means that an interrupt is likely to result in the program's being
scrambled. In the classic first-contact SF novel "The Mote in
God's Eye", by Larry Niven and Jerry Pournelle, an alien describes
a very difficult task by saying "We juggle priceless eggs in
variable gravity." See also {hack mode}.
-- The AI Hackers Dictionary