An internet holiday on december 18 introduced by the youtuber Alex Day in 2011 to give people the chance to buy his song 'Forever Yours' which he was trying to get to number 1 for the UK Christmas Charts - being the first unsigned artist to get to number 1 if he succeeds....

On forever day, you dress up in crazy clothes, and just have a good time!
Person 1: Why are you dressed up in crazy clothes?

Person 2: It's forever day!

Person 1: what?

Person 2: it's december 18, it's forever day!

Person 1: of course! how could I forget!
by doctorwhonerd98 December 18, 2011
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It is a sick ass Epic Hardcore band that originated from San Diego. Formerly known as Love Is Envy, FDF is reputably known in San Diego hardcore scene for it's legendary break downs and melodic choruses.
Forever Days Forgotten (FDF)

Noun: 1."FDF just destroyed my home stereo with a Bass Boost!"

2."FDF makes my ear pussy wet."

Adj: 1."My friend broke his nose in the FDF Mosh-Pit!"

2."FDF slam dance cream your pants party!

3."This dancer just got FDF treatment ."

Verb: 1."I'd like to FDF the shit out of the ignorant music listener..."
by The Legend619 July 16, 2009
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A Statement that is used to show how long you will love that specail someone. It is also used to show that specail someone that you will stand by them for forever & a day.
by Angelicdestiny May 18, 2010
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An expression which shows how long something takes.
"Have you played that online game yet"
"No, because it took forever and a day to load"
by Neezy March 4, 2005
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Fur-Day but forever! Good luck surviving anti-furries!
Nathan: Hey it's Fur-Day!
Jason: No, It's Fur-Day Forever!
Nathan: Really? Nice!
by LoopyPawss April 2, 2021
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