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1.
Something very shocking, that takes the ground off of you. Something that is mind blowing.
Some earth-shattering revalations
by vickyloka October 02, 2009
 
2.
When something is so amazing that it changes your world. Another way of saying mind blowing, or fucking amazing.
Jeremy Lin's win streak is Earth Shattering!
by ashack February 15, 2012