Spanish phrase
No te duermas.
Meaning
Don't fall asleep.
When to use it
A warning to stay awake. Used to tell someone to remain awake during travel or a call; tone can be gentle advice or a firmer command.
Example dialogue
No te duermas, que queda mucho camino.
Don't fall asleep, there's still a long way to go.
Vale, estaré atento, gracias.
Okay, I'll stay awake, thanks.