better half
US /ˈbet.ər ˌhæf/
UK /ˈbet.ər ˌhæf/

1.
cara-metade, marido, esposa
a person's husband, wife, or long-term partner
:
•
I'm going to ask my better half if she wants to join us for dinner.
Vou perguntar à minha cara-metade se ela quer jantar conosco.
•
He always consults his better half before making big decisions.
Ele sempre consulta sua cara-metade antes de tomar grandes decisões.