wizard hat: n. [also, after Terry Pratchett, `pointy hat']
Notional headgear worn by whoever is the wizard in a particular
context. The implication is that it's a transferable role. "Talk
to Alice, she's wearing the TCP/IP wizard hat while Bob is on
vacation." This metaphor is sufficiently live that one may actually
see hackers miming the act of putting on, taking off, or
transferring a phantom hat. Compare patch pumpkin.
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