to be a brown-noser, to suck up
Leonardo vive puxando saco do chefe! Deve estar querendo uma promoção!
Leonardo is always sucking up to the boss! He must be trying to get a promotion!
The expression is widely traced to Brazilian army barracks. It began as a nickname for the recruits and low-ranking soldiers who, during marches and troop movements, carried the kit bags and personal belongings of their superiors — literally "pulling the bag" for the officers.
Source: Jornal O Impacto.
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