For those unaware of the term, it's short for Foreign Object Damage and refers to things that could damage an aircraft. Here's a video of FOD being sucked into a jet engine. I think it's an A6, but it's been a long time since I did carrier duty.
[ame="http://www.youtube.com/watch?v=L_gpPbpONK4"]YouTube - Sucked Into Jet Engine[/ame]
[ame="http://www.youtube.com/watch?v=L_gpPbpONK4"]YouTube - Sucked Into Jet Engine[/ame]