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The Four Largely Popular thrash metal bands that formed in the 1980's. These bands dominated the thrash scene.
They were,Metallica,Megadeth,Slayer and Anthrax.

runners up include-
Exodus,Death Angel,Overkill, destruction and Kreator
the big four of thrash were influenced by hardcore music and NWOBHM and went on to inspire nearly all of todays metal. Slayer Alone is said to be one of the forefathers of death metal.
by kane the main mclain July 10, 2008
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Aug 7 Word of the Day
A celebrity free pass is an agreement between you and your significant other that if you meet said celebrity and there is an opportunity to sleep with them, your partner cannot get mad at you for doing so because you had agreed before hand that this person was your celebrity free pass. It is ideal if both of you in the relationship choose a celebrity free pass so that the playing field is even.
Julia met Drake at a bar, and hooked up with him, knowing that her significant other could not be mad at her, because Drake was her celebrity free pass.
by gingerale011 March 25, 2011
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the four biggest and best thrash metal bands. metallica, megadeth, anthrax and exodus
metallica, megadeth, anthrax and exodus are the big four of thrash
by jkgvfhgk December 22, 2006
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Metallica, Exodus, Megadeth and Anthrax. Slayer is not one of the original top four, despite what you may hear. Top citation is Dave Mustaine who pushes a "top 5" that includes Slayer, but does not replace Exodus.
Metallica, Megadeth, Anthrax and Exodus are in the original Big Four of Thrash
by smc123 November 06, 2007
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Metallica, Megadeth, Anthrax, Exodus (not Slayer). As much as we might want it, Slayer was never considered one of the original big four (probably should have been a "big five"). I have seen Slayer replacing Exodus on several pages now including this one and Wikipedia. Not so. Slayer was often categorized differently than the mainstream 80's Thrash bands (Death metal, etc, although I don't think this exactly fits either).
The Big Four of Thrash from the 1980's were Metallica, Megadeth, Anthrax, and Exodus
by smc123 October 30, 2007
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