look up any word, like timebomb:
 
1.
Someone who pretends to be busy but is really listening to everyone's conversation.
Look at that girl, she's being a filer again!
by nn_paige July 11, 2008
 
2.
An adjective used to describe an action that is utterly and completely lame.
Dude, what OJ Simpson did was seriously filer.
by Tyler Lloyd September 10, 2006