Facebook Display of Affection. As opposed to a PDA (Public Dispay of Affection), an FDA is an over the top way of letting everybody know you love and lust for your significant other through Facebook.
Facebook Status:

I can't believe my freakin' dad posted an FDA today. Check this shit out -"I'm just thinking about my beautiful wife who is as hot today as she was 25 years ago when I married her. I can't wait to get you in the sack tonight, baby!!!"
by Matt in Austin June 10, 2009
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Facebook Display of Affection, a variation of PDA. Some douche uploads a profile pic of him/her making love with their wonderwall. Usually to the disgust of their peers.
Some bitch is violating FDA regulations, check it! They're doing the nasty on her prof shot.
by MacDaddy PH January 5, 2008
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Facebook Display of Affection: when a person's facebook picture is of him/her kissing his/her boyfriend/girlfriend. ultimately too intimate for the public's liking
Eww, look at her profile picture in the news feed! FDA much?
by heathledgerforever December 17, 2009
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Dude, that 7-year-old boy over there is a total FDA.
by FDA_Pro December 7, 2010
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The food and drug administration of america. They create all of the indecipherable labels called "nutrition" facts, in which everything is measured in metric to confuse dumb ass Americans.
If the FDA was reliable it would be illegal to purchase Necco Wafers
by Hitler fan 420 May 10, 2016
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Facebook display of affection. A form of PDA but with cheesy love notes and pictures on Facebook.
"You are my reason for living, I need you more than anything, I miss you so much. I'm thinking of you all the time. Love you forever schnookums..."

If that's on someone's Wall, you have a prime example of FDA.

+o(
by tlc260 June 11, 2007
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Facebook display of affection

WHen people use facebook as a means to show the world who they are dating, who they're BFF with...
My ex keeps writing he loves his new girlfriend in his facebook status...I hate FDAs
by blinking_mariposa86 January 4, 2009
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