[{"Bold_text": "noun", "List Items": ["a digital-technology expert or enthusiast (a term of pride as self-reference, but often used disparagingly by others).", "a person who has excessive enthusiasm for and some expertise about a specialized subject or activity:a foreign-film geek.", "a peculiar person, especially one who is perceived to be overly intellectual, unfashionable, or socially awkward.", "a carnival performer who performs sensationally morbid or disgusting acts, as biting off the head of a live chicken."]}, {"Bold_text": "verb (used without object)", "List Items": ["to be overexcited about a specialized subject or activity, or to talk about it with excessive enthusiasm (usually followed byout):I could geek out about sci-fi for hours."]}]