1. to perform one's job or tasks with little enthusiasm, effort, or commitment; to work in a lukewarm or unenthusiastic manner
He was working halfheartedly on the project, showing little interest in completing it.
Ele estava trabalhando sem entusiasmo no projeto, mostrando pouco interesse em completá-lo.
2. to engage in work activities without full dedication or passion
After the argument, she worked halfheartedly through the rest of her shift.
Após a discussão, ela trabalhou com meia dedicação pelo resto do seu turno.