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When a person is so stressed, furious, enraged,mad, livid, superfluous with anger that they are about to pop. Thus, they are at the brim of their core.
Evan: "Carlos, did you hear about two girls one cup? watch this!"

Carlos: "Argh!!!, argh!!!!, no, I don't want to watch! Argh!! I am at THE BRIM OF MY CORE!!!!!!"
by Carloswithac April 10, 2009
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