1. Work performed without proper care, attention, or accountability; work done carelessly or negligently
The contractor's irresponsible work resulted in structural damage to the building.
O trabalho irresponsável do contratante resultou em danos estruturais ao edifício.
2. A task or job completed without fulfilling obligations or considering consequences
His irresponsible work on the project caused the team to miss the deadline.
O seu trabalho irresponsável no projeto fez a equipe perder o prazo.