gnarly

from WordNet (r) 3.0 (2006)
gnarly
    adj 1: used of old persons or old trees; covered with knobs or
           knots; "gnarled and knotted hands"; "a knobbed stick"
           [syn: {gnarled}, {gnarly}, {knotted}, {knotty},
           {knobbed}]
    
from The Collaborative International Dictionary of English v.0.48
Gnarly \Gnarl"y\, a.
   Full of knots; knotty; twisted; crossgrained.
   [1913 Webster]
    
from Jargon File (4.4.4, 14 Aug 2003)
gnarly
 /nar'lee/, adj.

   Both {obscure} and {hairy} (sense 1). "{Yow!} -- the tuned assembler
   implementation of BitBlt is really gnarly!" From a similar but less
   specific usage in surfer slang.
    
from The Free On-line Dictionary of Computing (8 July 2008)
gnarly

   <jargon> /nar'lee/ Both obscure and {hairy}.  "{Yow}! - the
   tuned {assembler} implementation of {BitBlt} is really
   gnarly!"  From a similar but less specific usage in surfer
   slang.

   [{Jargon File}]

   (1996-09-17)
    

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