GEEK
eccentric, eccentric person, flake, oddball, geek
(noun) a person with an unusual or odd personality
geek
(noun) a carnival performer who does disgusting acts
Source: WordNet® 3.1
Etymology 1
Noun
geek (plural geeks)
(dated) A carnival performer specializing in bizarre and unappetizing behavior.
(colloquial) A person who is intensely interested in a particular field or hobby and often having limited or nonstandard social skills. Often used with an attributive noun.
(colloquial, by extension) An expert in a technical field, particularly one having to do with computers.
(uncountable, colloquial) The subculture of geeks; an esoteric subject of interest that is marginal to the social mainstream; the philosophy, events, and physical artifacts of geeks; geekness.
(colloquial) An unfashionable or socially undesirable person.
Synonyms
• (carnival performer): freak
• (person intensely interested in a particular field or hobby): dork, nerd, propeller head; see also dork
• (expert in a technical field): freak, guru, hacker
• (unfashionable or socially undesirable person): loser, nonce, waste of space; see also worthless person
Verb
geek (third-person singular simple present geeks, present participle geeking, simple past and past participle geeked)
(colloquial) To behave geekishly or in a socially awkward manner, especially when under the influence of drugs or other psycho-active substances, and exhibiting such marked characteristics as hyperactivity, repetitiveness, talkativeness, nervousness, irritability, or paranoia.
Usage notes
• Usually used in combination with out or up.
Etymology 2
Noun
geek (plural geeks)
(Australia, colloquial) A look.
Synonyms
• (Australia, look): butcher’s, gander
Verb
geek (third-person singular simple present geeks, present participle geeking, simple past and past participle geeked)
(Cornwall) To look; to peep; to stare about intently.
Synonyms
• See Thesaurus:look
Source: Wiktionary