"Petty" is a song by Jessie J that describes the singer's frustrations with someone who constantly tries to bring her down and spread negativity. The lyrics suggest that this person is fake, pretending to be sweet and kind in public but behind the scenes, they are cold and cruel. The song tells the story of a toxic relationship, where the other person constantly bites at Jessie J's success and tries to gain fame by mentioning her name. Jessie J expresses her sadness at the fact that this person is always looking for ways to bring her down and uses her for their own gain. Throughout the song, Jessie J asserts her confidence and dismisses the pettiness of this individual. She urges them to stay out of her life and stop leaving negative comments on her photographs. Despite their efforts to upset her, she tries not to let their actions affect her and even finds their behavior laughable. The repetitive chorus emphasizes the pettiness of this person, highlighting that being petty is not enough to describe their actions. Jessie J believes that they have something else about them that fuels their need to bring her down. Ultimately, she addresses their pettiness and asserts her own self-worth, refusing to let their negativity impact her.