1. Claimed or announced by oneself without official confirmation or verification; declared by the person themselves
The self-proclaimed expert gave advice that turned out to be incorrect.
O autoproclamado especialista deu conselhos que se mostraram incorretos.
2. Declared oneself to have a particular status or quality, often implying doubt about the legitimacy of such claim
He is a self-proclaimed artist with no formal training.
Ele é um artista autoproclamado sem treinamento formal.