a HUGE shit that when it comes out you think to yor self, dam, i dropped a lung.

or when you get scared and drop a brink or log.
niall: should nof seen my toilet yesteray!
tom: why?
reece: i did.
niall it was as brown as morphius! the fatty duke covered the floor!
tom:shweet, i eat that shit man!
by theladylicker November 20, 2011
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Synnonym of Boobs. Straigt men often consider them awesome and important.
Dude, look at the fatty chest dukes on that girl. Man, she could feed an army.
by Jake Gus December 1, 2004
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a massive dump that will fly out your ass wether you want it to or not, a toilet filler.
Tom: OH GOD , ITS GUNNA BLOW!
Niall: is it a fatty duke?
Tom: yes , its a big one!
Niall: OMG ITS EVERWHERE!
Tom: AAAAH MY ASS BURNS!
Niall: dayum!
by morphiusthegreat November 21, 2011
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