Source : WordNet®

weeds
     n 1: a black garment (dress) worn by a widow as a sign of
          mourning [syn: {widow's weeds}]
     2: a black band worn by a man (on the arm or hat) as a sign of
        mourning [syn: {mourning band}]

Source : Free On-Line Dictionary of Computing

weeds
     
        1. Refers to development projects or {algorithm}s that have no
        possible relevance or practical application.  Comes from "off
        in the weeds".  Used in phrases like "lexical analysis for
        {microcode} is serious weeds."
     
        2. At {CDC}/{ETA} before its demise, the phrase "go off in the
        weeds" was equivalent to {IBM}'s {branch to Fishkill} and
        mainstream hackerdom's {jump off into never-never land}.
     
        [{Jargon File}]