Dickdown Countdown 

A small and limited period of time where one engages in as much sexual contact with as many partners as possible.

I'm leaving the country in a month so I am going on a dickdown countdown.

Dickdown Countdown by adamnmn86 May 13, 2010

infamous countdown 

In Ron Jeremy films, the female counts down from 20, and on 0 Ron comes right in her mouth.

Female: It's time for the infamous countdown... I'll countdown from 20 and on 0, you cum right in my mouth.
Ron: On 0, right in the mouth.

infamous countdown by Scripple021 May 6, 2004

Street Countdown 

its like normal countdown but on the street made famous by I.T Crowd

Let Street Countdown Game Begin I'll Have A Vowel I'll Have A Consonant Please

Street Countdown by I LOVE TOASTERS July 8, 2010

Facebook countdown 

When you're feeling extremely happy (or occasionally awfully sad) that you can't wait til getting home to upload your facebook status, thus ignoring your family at all.

YOU: I can't believe it!I passed the exam!I graduated!!

FRIEND: oh,congrats dude! go home,your family must be anxious and wanting to hug you and celebrate!

YOU:no way man! I'm on the facebook countdown,,all I want is to upload my status.. My family will have time to celebrate then.

FRIEND: you freak!

Facebook countdown by Nachoo December 19, 2009

The Final Countdown Effect 

-noun

The effect that listening to the Europe song "The Final Countdown" has on mundane, boring everyday activities, by making them instantly more exciting and entertaining.

I'm not that good at magic, but The Final Countdown Effect makes me seem more credible as a magician.

The Final Countdown Effect by Marry_Me November 19, 2010

Corn Countdown 

Purposely eating one or more servings of corn to time and count your digestive process. The countdown from consumption to evacuation and spotting said corn in one’s shit.

I’ve been having some bowel issues lately. My doctor recommended a corn countdown before ordering any tests.

Corn Countdown by Eaton Holgoode April 3, 2018

Cum Countdown 

Cumming right as the clock hits midnight (12:00) on New Years Eve.

I did a Cum Countdown to start 2023!

Cum Countdown by Rionox December 31, 2022