1 definition by hankmaster69

Stemming from the name of the nuclear bomb dropped on the Japanese city of Nagasaki; this term means to stand a top the tank of ones toilet and proceed to shit into the bowl from that height, resulting in a large splash, and if one has had Indian food, a considerable mess.
"Hey John come in here! I'm about to drop a Fat Man!"
by hankmaster69 November 9, 2017
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