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1.
Haunted by a bad vibe or aura. Can be used as a noun or an adjective.
Now that place had some bad juju.

In answer to a question about what someone thought of a person place or thing one could answer, "bad juju".
by Brian McKinney February 14, 2004
 
2.
A Person Who Sleeps Around So Much That They Must Have Several STDs.
Damn, I Must Have Saw That Girl With Four Different Guys At That Party, I Wouldn't Mess Around With That, She's Bad JuJu!
by Big "Boss" Daddy December 01, 2010