The same thing as shampee and shampiddle; that is, a bottle of shampoo that's been wrecked because some dillhole uranated into it.
John Grass uranated into bottles of shampoo at the Juneau Receiving Home in the very early-1980s, thus converting them into shampotty and subsequently earning the nickname "The Shampoo Killer".
by Telephony March 20, 2011
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