Source : Free On-Line Dictionary of Computing

file descriptor leak
     
         (Or "fd leak" /F D leek/) A kind of programming
        {bug} analogous to a {core leak}, in which a program fails to
        close {file descriptors} ("fd"s) after file operations are
        completed, and thus eventually runs out of them.
     
        See {leak}.
     
        (1994-11-30)