1 definition by mhm53360

Top Definition
an acronym for Cow Jumps Over Sun.
a person who is very annoying, and is overly obsessive towards people who do not like her/him.
there can be many varieties of a CJOS, including, shor cjos, fat cjos, skanky cjos, and just the natural one.
no body likes cjos's.
She's so annoying! She's such a CJOS.
by mhm53360 November 20, 2009
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