A hairdo done in a hurry that serves a bigger purpose in life than most hairdos: Productivity. The higher the bun the more productive one will be.
Example 1
Coworker 1: Hey I have a questio--
Coworker 2: Not now, I'm in the zone.
Coworker 1 to Coworker 3: (whispers) I should have known, just look at that productivity bun.

Example 2
"Guys can have productivity buns too. My friend Nathaniel has one, and he's a famous DJ."
by The Real Smashley April 17, 2014
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