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1 definition by
the30
the 30
to be completely
knowledgeable
on a particular
subject
;
the authority
"
Jennifer Aniston
is the 30 on ruining her own relationships."
"That guy is the 30 on not
being cool
... he has a
mullet
!!!"
by
the30
March 29, 2009
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the 30
mug.