FOD /fod/ v. [Abbreviation for `Finger of Death', originally a
   spell-name from fantasy gaming] To terminate with extreme prejudice and
   with no regard for other people. From {MUD}s where the wizard command
   `FOD ' results in the immediate and total death of ,
   usually as punishment for obnoxious behavior. This usage migrated to
   other circumstances, such as "I'm going to fod the process that is
   burning all the cycles." Compare {gun}.

   In aviation, FOD means Foreign Object Damage, e.g., what happens when
   a jet engine sucks up a rock on the runway or a bird in flight. Finger
   of Death is a distressingly apt description of what this generally does
   to the engine.


Source: The Jargon File

FOD
     Flexible Optical Disk (OD)
     
     
Source: Virtual Entity of Relevant Acronyms