The term "Najarbattu" (also often spelled Nazar Battu ) refers to an evil eye warder or a talisman used to protect against the ill effects of the evil eye ( nazar in Hindi/Urdu), which is believed to be caused by envious or malevolent glances.
While the core meaning is about protection, "Najarbattu tops" could refer to a few different things in the context of fashion and merchandise: