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This is an acronym S.H.R.N. which stands for "so hot right now". But the acronym can be used to describe anything that is hot right now and pronounced as "shern".
fuck, I'm shrn
oh god, Patrick is so not shrn
by GP April 26, 2005
So high right now.
Brahs, I was SHRN as fuck after smokin that Death Star!
by GimmeThePat June 17, 2010