A person who consistently floods your news feed with their facebook actions. ie Writing on walls, taking quizes, updating their status every minute.
Guy 1: Man did you see the joke I had in my Facebook status? it was hilarious!
Guy 2: Sorry man Selena was going crazy with that Facebook Overdose (FOD). she was FODing and I wasn't able to see any other peoples actions sorry.
Guy 1: Fuck you.