Juju

Juju is a term used by Humans of west African and French colonial origin to describe a certain type of luck, sometimes attributed to qualities of witchcraft designed to change the luck of recipients.

When Ensign Travis Mayweather was assigned to the United Earth starship USS Yorktown in the 2150s decade, during the Earth-Romulan War, he felt like he was perceived as bad luck, or "bad juju", by the crew of that vessel. He felt that the crews of other vessels felt the same way, since Mayweather had been the helmsman on duty when the Daedalus-class USS Discovery had been lost at Berengaria. 

Lieutenant Francis Drake Reed, of colonial islander origin, was fond of using this term in describing activities. He referred to his juju as luck in playing pool in 2243, while hustling a group of traders and miscreants on Starbase 2, saying that his opponents would need warp drive-powered pool cues to keep up with his juju. He used the term again when advising George Kirk about he luck that would be required to defeat a group of Romulan birds-of-prey that were facing down the prototype ship they were traveling aboard.