The all-consuming, incomprehensible rage old rich people get when talking how about much Facebook is worth because of how silly they think it is. Specifically applies to the very rich who might invest in it. The Wall Street Journal publishes front-page stories on Facebook stock price while it puts normal company prices in the back, which aggravates the disease.
My boss heard Facebook's janitor bought a new Ferrari and he jumped out the window. Facebook Derangement Syndrome (FDS) fatality number 489.
by Tederator March 5, 2011
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The phenomenon where people post and comment about a celebrity`s death years afterwards as if it just happened.
Facebook Poster: RIP Rue Mcclanahan. I loved you on the Golden Girls.
Reply: dude, she died 5 years ago.
Facebook poster: sorry. Facebook second death syndrome strikes again.
by coupondad7 July 1, 2015
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When you are bored or you've been away from Internet access or just whenever you log in to Facebook over and over even though pretty much nothing changes, but you just do it to a) have something to do b) make sure no one's magically done something cool. Called such because it's like when you're hungry or (more likely) bored and so you keep checking the fridge in the hopes that something new and exciting will appear, even though you know it's just week-old leftovers.
Dude 1: Hey, have you noticed Lou's been on Facebook a lot today?

Dude 2: Yeah, he was camping all last week...must have the Facebook Fridge-Check Syndrome.
by SchylertheSuperStar October 3, 2011
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When one uses either facebook or myspace to look at people or try to meet people and they see the picture of a good looking person. Once they meet up the one that thought the person on myspace or facebook was good looking, find out that that person is infected with "She/he looked better on facebook/myspace syndrome".
guy1:hey, dude... i met this girl on myspace and she looks hot.
guy2:yeah.... i've seen her and she has the she/he looked better on facebook/myspace syndrome.
guy1:shit...
by Robin Andersen April 1, 2008
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