DuckCorp Dico

Found one definition

1.                 From The Jargon File (version 4.4.7, 29 Dec 2003):
                   
   
   
                   
                     
   obscure
    adj.
       Used in an exaggeration of its normal meaning, to imply total
       incomprehensibility. “The reason for that last crash is obscure.” “The find
       (1) command's syntax is obscure!” The phrase moderately obscure implies
       that something could be figured out but probably isn't worth the trouble.
       The construction obscure in the extreme is the preferred emphatic form.