1 definition by oh ya know.

a great guy, pretty much natures nobleman.
honest, faithful, and even has nice hair and teeth. great brother, friend, and anyone who dates him is a pretty lucky girl. jacs' usually excel at sports such as track and soccer.

"that guy is so cool, he's such a jac"

"did you know in the past days, baby jesus was referred to as jac?"
by oh ya know. September 9, 2008
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