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1.
shit that didn't happen: ie, when people post stupid stories on the internet to make their boring lives seem more interesting than they really are
example 1: from fml: "Today, my boyfriend went down on me for the first time. He definitely killed the mood when, while down there, he started saying, "Nomnomnomnom." FML"

this probably didn't actually happen, hence, stdh

example 2:

Person 1: "...my uncle works at nintendo..."
Person 2: "stdh"
by nothitler November 21, 2012