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

1.
raddoppiare, condividere
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.
Abbiamo dovuto raddoppiare in una piccola camera d'albergo durante il nostro viaggio.
•
Due to limited space, some students will have to double up in the dorms.
A causa dello spazio limitato, alcuni studenti dovranno raddoppiare nei dormitori.
2.
piegarsi in due, contorcersi
to bend over or curl up, typically because of pain or laughter
:
•
He started to double up with laughter after hearing the joke.
Ha iniziato a piegarsi in due dalle risate dopo aver sentito la barzelletta.
•
The sudden pain made her double up.
Il dolore improvviso la fece piegare in due.