Top Definition
Suddenly waking up with the a strong desire for the toilet and the turtles head emerging uncontrolably - brought on as a result of consuming large quantities of the black stuff in the preceding hours
'I had a 'Guiness alarm clock' going off at seven thirty and now I'm off to the fucking launderette!!!'
by I Seymour April 25, 2009
5 Words related to Guiness alarm clock

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