A word that can take the place of any other word during a banterous exchange, normally to mean 'annoyed' or to take the place of a nonsense word. It is often used when somebody is 'triggered'. Also used for emphasis.
A very bad friend who you don't want to talk with. She's annoying and selfish. She always talks about the LGBT+ community and she doesn't care about anything else.
Person 1: Omg Juju is so annoying!
Person 2: Yes, she always makes everything so awkward!
Person 1: I hate her so much.
Person 2: Me too.