The word geek is a slang term for odd or non-mainstream people, with different connotations ranging from "a computer expert or enthusiast" to "a person heavily interested in a hobby", with a general pejorative meaning of "a peculiar or otherwise dislikable person, especially one who is perceived to be overly intellectual".
Although often considered as a pejorative, the term is also often used self-referentially without malice or as a source of pride.
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If you're a true geek, you should have no problem to solve this puzzle that begins (begins only) below! Good luck :-)