This is a regular verb. It follows the conjugation pattern of the verb falar.
In Brazil, this verb is very common in informal speech, meaning to freak out or lose emotional control. In both Brazil and Portugal, it is also used in clinical or psychiatric contexts to describe a psychological episode.
Present Tense:
Ela surta toda vez que tem prova.
(She freaks out every time there's a test.)
O paciente surta durante a noite.
(The patient suffers a psychotic episode during the night.)