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The adjective form of "Sarah"; combining "fantastic" and "Sarah"; relating to the insanely awesome, spontanious acts of amazingness that is executed by a "Sarah", or one that bears the name, "Sarah". However, it can also relate to the personality of a "Sarah".

*please note the h at the end of "Sarah", this is definately the right way to spell it
Haha, wow that was so sarahtastic.
by smithling123 April 03, 2011
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