Individualist strand of anarchism, rejecting the pursuit of a greater cause.
Property belongs to those who take and defend it. They don’t fight for or against humanity, they want to abolish not only the state but also society as a whole. Everyone is on their own. There is no obligation to help others.
Sounds like a bunch of hedonistic abolitionists. But there is also something like an Egoist Union in which everyone explicitly agrees to take part in out ouf their own will.
Egoist anarchism is mainly grounded in the thought and writing of Max Stirner.