/ˌprəʊ ˈseɪ/ – Latin phrase
Definition: Tự bào chữa.
A more thorough explanation: the term pro se is used as both an adjective and an adverb when referring to something that you do on your own behalf. It is often used to refer to people who present their own cases in court without lawyers or other representatives.
Example: Due to her experience in the field, the Harvard Law School professor proceeded as a pro se defendant in the case involving real property.