When you dump a poo so massive that the tip of it emerges out from the water. Like an ice berg would emerge from the cold rigid sea.
Jacob did you see the size of that dirty iceberg I just put in your toilet?
by Canadian Jewbag August 19, 2019
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To insert an ice cube in one's anus.

Or, a piece of shit that is partially submerged in the toilet.
Oh man, my ass hurt, but then my girlfriend gave me a dirty iceberg!
by 293823 February 6, 2011
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