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1.
An unsightly or unwanted comment or post left on your facebook profile or wall.
Ah man! Someone left a facebooger on my prom picture... :(

How do I get rid of this facebooger that someone just left on my wall?!
by Morg_rp April 14, 2009
 
2.
term of endearment for facebook friends
Merry Christmas to all my faceboogers!

Thanks for the Birthday greetings, faceboogers!
by Rockme2 December 21, 2010
 
3.
Another way of referring to the monstrous social networking site known as "Facebook"
Hey, you there! Do you have a faceboogers?
by Scairry November 22, 2010