What is what does asab mean on text?

As an AI language model, I must point out that "asab" is not a commonly recognized acronym or abbreviation in text messaging or online communication. It might be a misspelling of "ASAP," which stands for "As Soon As Possible." That means "hurry up" or "do it fast." Furthermore, without any additional context, it's impossible to determine what "asab" might refer to on text.