DEADBEEF

DEADBEEF /ded-beef/ n.  The hexadecimal word-fill pattern
   for freshly allocated memory (decimal -21524111) under a number of
   IBM environments, including the RS/6000.  Some modern debugging
   tools deliberately fill freed memory with this value as a way of
   converting {heisenbug}s into {Bohr bug}s.  As in "Your
   program is DEADBEEF" (meaning gone, aborted, flushed from memory);
   if you start from an odd half-word boundary, of course, you have
   BEEFDEAD.  See also the anecdote under {fool}.