1The demon of Envy in the seven deadly sins.

2A giant sea serpant who's body lenth tries to compete with my apendage but fails.

3A summon in final fantasy.
In a final fantasy battle seen Cloud Strife summons leviathan
Enemy:Holy shit look at the size of its wang.
by Noctis333 May 08, 2010

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In Farscape, the hero John meets a giant, living, Leviathan ship named Moya. Leviathans are biomechanical and peacefull to a fault. They can utilize a faster than light method of travel called starburst for defense or long range travel. Leviathans often have a symbiotic pilot.
Tell Moya (leviathan) to starburst out of here NOW!
by DalekDan November 11, 2006

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A long poop that goes down into the bottom hole of the bowl, and breaches the surface of the water.
That there is a leviathan poop.
by Elliot.Sven.Masson May 11, 2016

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1.A steampunk series by Scott Westerfeld
2. Something very big
My favorite character in Leviathan is Bovril.
by The Billionth Random Monkey December 15, 2014

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The best band in the history of USBM. Wrest plays all instruments.
Any of his demos/albums. Leviathan is Wrest. Wrest is Leviathan.
by wrest13 June 13, 2010

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A guild on the Echo Isles server on World of Warcraft that will never see End Game content. Founded in Chicago by a 30-something Toys R Us employee, Leviathan quickly became the hang out for various miscreants obsessed with harassing members of other guilds, namely the more successful Paradigm. But the fun was quickly ended when the expansion, Wrath of the Lich King, was released and the members attempted to power level to 80, pushing TriviaBot aside permanently. Several members were asked, or influenced to "respec" to help the guild, but were forced to PuG lower level runs. When asking guild officers to assist in progression, chaos ensued. Toons were transferred to different servers and renamed. Today, the guild still exists with only a few of its original members and their several alts, all of whom are severely under-geared.
Leviathan is now recruiting, please pst for invite.
by Nekiddiva February 04, 2009

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One of the four main demons of Satanism. The other three are Belial, Satan and Lucifer. If you are misinformed, please read The Satanic Bible by Anton Lavey. As strange as it seems, Satanics do NOT worship Satan. We find those four main demons as accepting them as something common, such as a tree, and we govern ourselves in that we worship ourselves. We make our own rules to live by, our own laws and our own lifestyles. ^^
Mojo: Out of the four, Leviathan is my favorite.
Shimi: Naw, Belial is much better.
by Shimi November 20, 2007

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