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The relief of urinating after holding it in for ages.

A retake of the TV ad in the UK advertising Bisto Gravy.
Ahh, Bisto is the catchphrase when they smell the fresh new gravy.
Ahh, Pissto is the word you say when you finally take that piss and words need to express your relief
Mid peeing, shout the words Ahh, Pissto
by Yohan McD December 16, 2010
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