The hexadecimal word-fill pattern for freshly allocated memory 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} and {dead beef attack}.
[glossary]
[Reference(s) to this entry by made by: {dead beef attack}{fool}]