fgrep

from The Free On-line Dictionary of Computing (8 July 2008)

fgrep

   <tool> A variant of the {Unix} {grep} command which searches
   for fixed (uninterpreted) strings rather than {regular
   expressions}.  Surprisingly, this is not always faster.

   (1996-10-27)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

FGREP
       Fixed Global Regular Expression Print (Unix, GREP)