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1.
(mɜ ʳsɪʒɒn)

Mersision is a period of time used to describe a realistic event
that starts off well or adequate but ends up either horrible,

horrifying, disastrous or leads to disappointment.
Cindi : I hate Mersisions, there so annoying
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Anna : Yesterday at my birthday party, I sneezed in the cake and everybody left
Cate : Wow, you must of had a really bad Mersision
by potaterz December 20, 2013