Source : Webster's Revised Unabridged Dictionary (1913)

Scrog \Scrog\, n. [Cf. {Scrag}, or Gael. sgrogag anything
   shriveled, from sgrag to compress, shrivel.]
   A stunted shrub, bush, or branch. [Prov. Eng. & Scot.]

Source : Free On-Line Dictionary of Computing

scrog
     
        /skrog/ [Bell Labs] To damage, trash, or corrupt a data
        structure.  "The list header got scrogged."  Also reported as
        "skrog", and ascribed to the comic strip "The Wizard of Id".
        Compare {scag}; possibly the two are related.  Equivalent to
        {scribble} or {mangle}.
     
        [{Jargon File}]