tighten your belt
US /ˈtaɪ.tən jʊər bɛlt/
UK /ˈtaɪ.tən jʊər bɛlt/

1.
se serrer la ceinture, faire des économies
to spend less money than you did before because you have less money
:
•
Due to the economic downturn, many families have to tighten their belts.
En raison du ralentissement économique, de nombreuses familles doivent se serrer la ceinture.
•
If we want to afford that vacation, we'll have to tighten our belts for a few months.
Si nous voulons nous offrir ces vacances, nous devrons nous serrer la ceinture pendant quelques mois.