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1.
When you have nothing better to do on New Years eve, you find a area with a good viewing point of a mass gathering and start masturbating close to the countdown - as they people start shouting 10 , 9 , 8 - you try and time your ejaculation to occur at exactly the end of the countdown as the clock strikes 12 and you hear everyone celebrating below and fireworks going off - and you pretend that it is all for your ejaculation.
10, 9 , 8,7,6,5,4,3,2,1, Hoooaaahh! *fireworks* - Wankdown!!
by Shaun47 January 01, 2010
 
2.
When you're watching Countdown you must race against the clock to blow your load.
whilst the two contestants where competing against each other for the maths game i was competing in my own game, a race against the clock to complete todays wankdown
by 30secondsOfHeaven June 01, 2011
 
3.
When the clock on Countdown starts, you start wanking. The objective is to complete before the clock hits zero. If you get a 9 letter word during the process you ejaculate immediately.
Wankdown COMMENCE 30...29...28...27...26...25...24...23...22...21...20...19...18...17...16...15...14...13...12..RECONVERT...EUUUUGHHHH
by Rachel_riley30 June 01, 2011