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The act of taking a serious shitsickle in the top tank of a toilet.
dude that chicks party was so lame top tanking her toilet was the only way to add a little atmosphere...she'll never forget that night once she discovers where that stench is coming from...don't go back for a few days !!!
by last star fighter August 31, 2007
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top-tankin

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When you drain the top tank of the toilet, and proceed to lay a steaming triple-coil in it. Mainly done by rich white kids.
Dont use the washroom. i was just top tankin
by Norge March 25, 2004
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top-tankin

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Taking a shit in the top tank of a toilet so that chunks of fresh shit fills the bowl with each flush.
Same as defined above.
by Random_DooD August 5, 2004
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top tanker

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The act of shitting in the top tank of a toilet (usually not your own)
Jeramy Russell gave the Shell station a top tanker after dude said we were too drunk to buy beer. When he was done, I pulled the ol' dry docker.
by larry the lesbian August 11, 2017
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Toptank

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The act of shitting in the cistern of an enemy's toilet to ruin their bathroom for a thousand flushes.
Shortly before they sealed off Hitler's bunker beneath Berlin, Larry Silverstein toptanked every toilet available and made good on his escape.
by Kenny Evil July 5, 2010
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