double up
US /ˈdʌb.əl ʌp/
UK /ˈdʌb.əl ʌp/

1.
doblar, compartir
to share a room or bed, especially when there is not enough space for everyone to have their own
:
•
We had to double up in a small hotel room during our trip.
Tuvimos que doblar en una pequeña habitación de hotel durante nuestro viaje.
•
Due to limited space, some students will have to double up in the dorms.
Debido al espacio limitado, algunos estudiantes tendrán que doblar en los dormitorios.
2.
doblarse, encogerse
to bend over or curl up, typically because of pain or laughter
:
•
He started to double up with laughter after hearing the joke.
Empezó a doblarse de la risa después de escuchar el chiste.
•
The sudden pain made her double up.
El dolor repentino la hizo doblarse.