noun

• (countable) A magic spell or hex.
• (countable) An object (such as a charm or amulet) used to cast magic spells, especially in hoodoo.
  "A doney, for instance, is a woman of worse than doubtful morals, and a nation sack is a cloth pouch worn on a string around the neck for holding mojos and small change."
• (uncountable) Spellcraft, hoodoo.
• (informal) Supernatural skill; exceptional luck, success, or power.
  "I haven’t seen much mojo in the state Legislature for that or any other major intervention, though. Hey, lawmakers, you should check out the test scores for your own school districts. It might be yours are needing some help, too, maybe even more so than Seattle."

verb

• (transitive, informal) To cast a magic spell on or jinx (someone).
• (transitive, informal) To annoy or bother (someone).