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Meaning manager of knowledge and a name given to those who have more than a passing resemblance to little wizards called Harry. Often used in congratulatory terms when people have aced a cross word or performed particularly impressive moves on the dance floor.
"Ask me anything, I'm a Sydenham of all"
"No that's not actually Harry - that's a Sydenham"
"That guy is amazing he so Sydenham'd that move"
"That is sooo Sydenham yo!"
by Liz-zie G May 28, 2008
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