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.