Source : Webster's Revised Unabridged Dictionary (1913)

Hairy \Hair"y\, a.
   Bearing or covered with hair; made of or resembling hair;
   rough with hair; rough with hair; rough with hair; hirsute.

         His mantle hairy, and his bonnet sedge.  --Milton.

Source : WordNet®

hairy
     adj 1: having or covered with hair; "Jacob was a hairy man"; "a
            hairy caterpillar" [syn: {hirsute}] [ant: {hairless}]
     2: hazardous and frightening; "hairy moments in the mountains"
     [also: {hairiest}, {hairier}]

Source : Free On-Line Dictionary of Computing

hairy
     
        1. Annoyingly complicated.  "{DWIM} is incredibly hairy."
     
        2. Incomprehensible.  "{DWIM} is incredibly hairy."
     
        3. Of people, high-powered, authoritative, rare, expert,
        and/or incomprehensible.  Hard to explain except in context:
        "He knows this hairy lawyer who says there's nothing to worry
        about."  See also {hirsute}.
     
        The adjective "long-haired" is well-attested to have been in
        slang use among scientists and engineers during the early
        1950s; it was equivalent to modern "hairy" and was very likely
        ancestral to the hackish use.  In fact the noun "long-hair"
        was at the time used to describe a hairy person.  Both senses
        probably passed out of use when long hair was adopted as a
        signature trait by the 1960s counterculture, leaving hackish
        "hairy" as a sort of stunted mutant relic.
     
        4.  {hairy ball}.
     
        [{Jargon File}]
     
        (2001-03-29)