This is the 6424th most frequent Portuguese word.
disque
"Disque" in Portuguese means "dial" or "call," often used to refer to a phone action or hotline.
Here, 'disque' is used colloquially to imply something that is rumored or said by others.
Disque não teremos aula amanhã.
They say we won't have class tomorrow.
In this context, 'disque' is the imperative form of the verb 'discar', meaning 'to dial' a number.
Disque o número da emergência se necessário.
Dial the emergency number if necessary.
'Disque' is again used as the command form of 'discar', urging the reader to act immediately by calling.