A person who creates false situations and irrational fears in their head of otherwise normal situations.
"Man I'm such a spiderhead, I can't even talk to a cashier"
by Therealme'smiles' April 27, 2023
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Inserting a penis into a girls mouth while on all fours.
Her four limbs in conjunction with your four limbs create the spiderhead effect.
by Arachnophobia February 1, 2010
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