when you are addicted to looking at the count down of months/days/hours/minutes/seconds until the release of a long awaited movie/book/game on the website for said movie/book/game in a desperate attempt to make the time till its release go faster.
'Hey Alice'. said Jane. 'are you looking forward to the release of the New Moon movie?' 'Yeah.' said Alice. 'I am! I have major countdownitis, I've been staring at the website for hours!'

(*note. I just used the names of my to favourite twilight characters for the example.)
by Suzy Turquoise Blue October 21, 2009
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When the perceived attractiveness of a girl diminishes as she gets closer
Guy 1: "Hey dude look at this chick walking up, she looks pretty cute"

Guy 2: "Yeah she looks to be about an 8..wait maybe a 7...6...5...4...3..2..OH GOD WHAT WAS THAT THING?!"

Guy 1: "Never underestimate the countdown"
by Jonan2012 November 1, 2010
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A girl that from a distance looks like a 10 out of 10, until she starts coming closer you then begin the 'countdown' from 10 until she's right up close you realise in fact she's only a 2!
"Shit mate, check out this Sheila over there, she's a 10! Hang on she's coming over here, countdown 10,9,8,7,6,5,4,3,2 aaaaarrrrrrgggggghh!
by Plummdogg March 31, 2016
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a kool ass tv game show programme which makes fuck all sense and the winner doesn't get any money from it
countdown is koo lets go watch it
by fred September 29, 2004
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A news program on MSNBC, hosted by Keith Olbermann. Famous for the host's signature wit and political commentary, as well as daily features, such as "Oddball" and "Worst Person in the World." Preceded on MSNBC's prime time lineup by "Hardball with Chris Matthews," followed typically by "Scarborough Country."
Last night I watched "Countdown" on MSNBC.
by ShadowCell April 18, 2007
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AIDS, or the battle a brother faces after contracting HIV from the red snapper of a neighborhood skeeza or hoodrat.
" he was straight up hittin the skins, you know...shifting some organs. Next day he all coughing and jivin on some Countdown shit"
by BrianPatrick March 6, 2007
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A UK game show that's been airing since 1982, where 2 contestants face off to get the most points. In the letters rounds, one of the contestants picks a vowel (a, e, i, o or u) or a consonant (any letter that isn't a, e , i, o and u). After 9 letters are on the board, the contestants have 30 seconds to come up with the biggest possible word that appears on the board. In the numbers round, the same thing occurs but Instead, they pick from either small (1-10) or large (25, 50, 75, or 100) numbers. After 6 numbers are picked, a random target is displayed. The 2 contestants then have the same amount of time to get as close to the target as possible without using the numbers twice (unless there's 2 of the same number on the board) and only using addition, subtraction, multiplication and division. In the final round called the Countdown Conundrum, 9 jumbled up letters (kinda like the letter rounds) are revealed and can form a 9 letter word. If either contestant get it right, they are awarded 10 points and possibly winning the game. If the person that buzzes in get it wrong, the other contestant has the remaining time to buzz in. If both get it wrong, then the person with the highest score wins automatically, but if tied, another conundrum is revealed.
Richard Whiteley will forever be known as Mr. Countdown
by Zeeboss276 May 2, 2022
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