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a conker-sized wad of clean toilet tissue that's been soaked under a cold tap and then, while soggy, thrown at somone, usually from above (i.e. by leaning over the partition between two toilets in a public lav).
hurl the bog-horror downwards towards the upturned and startled face of your target while shouting "have that you bastard"
by spacenewt December 08, 2009
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