It's the present tense form of the verb "despertarse" (to wake up) in the singular imperative form, meaning it's a command to one person to wake up.
Here are some examples:
* "Desperta, ya es tarde." (Wake up, it's already late.)
* "Desperta, ya llegó el bus." (Wake up, the bus has arrived.)
It's important to note that Chavacano is a Spanish-based creole language spoken in the Philippines. It has its own unique vocabulary and grammar, and while many words are similar to Spanish, there are some differences.