A person who has gotten so addicted to the show Countdown, it develops into a medical condition. It could even make one form an emotional attachment to a Countdown clock.
David: I love playing Countdown. I play it at least 5 times a day.
Karl Pilkington: Perhaps you need to see a doctor, you may have countdown-a-tosis.
Karl Pilkington: Perhaps you need to see a doctor, you may have countdown-a-tosis.
by jrs99 August 18, 2023

When giving a dude a handjob and 10 seconds before they splurge you begin giving them a 10 second count down and when the countdown hits 1 second the dude will splurge
by 9/11 lover May 23, 2024

kpop fan1: have you heard nayeon’s new album?
kpop fan 2: yes, what’s your favorite song from the album?
kpop fan 1: love countdown
kpop fan 2: that’s my favorite to
kpop fan 2: yes, what’s your favorite song from the album?
kpop fan 1: love countdown
kpop fan 2: that’s my favorite to
by melsaminor July 24, 2022

A New Zealand supermarket chain that is the exact fucking same as an Australian Woolworths store. Same food, same logo, same colour sceme. But don't try to use your Woolworths Rewards card at a Countdown. Trust me. It won't work.
by benrad July 21, 2019

The act of anal sex in which the partner on the receiving end takes a large amount of laxatives. The goal is then to for the one penetrating to finish before the laxatives take effect.
-Hey John, how did your date with Sarah go?
-Horrible, she wanted me to do the Yarmouth countdown
-Gross
-Horrible, she wanted me to do the Yarmouth countdown
-Gross
by mr metcalfe June 4, 2021

A euphemism for masturbating, stemming from the idea of watching the rather mundane but charming letter/number-based UK game-show, Countdown.
by nompynuthead May 22, 2017
