Facebook fail 

1. Acting like a complete douchebag in a way only possible on Facebook. This might involve relatively innocuous things like Facebook stalking or being a Facebook whore, or it might be a little more obnoxious, like telling Friend A that you can't go out on Saturday night and then posting tons of pictures from Friend B's party the next morning.

2. The innate quality of Facebook that inspires this sort of behavior.

"Why does his ex-girlfriend keep writing cute little posts on his wall? Do you think they've still got something going on?"

"Honey, don't worry about it. It's just Facebook fail."

Facebook fail by pocketseizure July 15, 2009

Facebook Fail 

When someone posts something on facebook that is meant to get alot of likes, (ie. LMS or tbh ) and nobody likes it.

This almost never happens to popular people.

Guy 1: "Have you seen jennifer's stat? She posted a LMS 4 hours ago and NOBODY liked it haha"
Guy 2: "Bahahaha facebook fail!!"

Facebook Fail by Dmjjmd2 August 7, 2011

Facebook fail 

Posting something on a social network that you wouldn't want some people to see but are able to see.

"Dude my parents saw that photo of me drinkin on facebook" "Oooh... facebook fail!", "Senior skip day on Monday" *sent to everyone so underclassmen can see* Facebook fail!

Facebook fail by Dudders Mcnugget April 26, 2009

Failed Facebook Fast 

One is said to have pulled a Failed Facebook Fast, or a tripple F, when the action of refraining from logging on to facebook (facebook fasting) has failed.

Susan was going to be facebook fasting for a week but she pulled a tripple F after a couple of days.

John said he was never going back on facebook, but he was back 1 hour later. Major failed facebook fast.

Failed Facebook Fast by SAphoto November 25, 2009