1. To end something in a memorable, impressive, or successful way; to finish with great impact or excitement
After 30 years as a teacher, she decided to go out with a bang by organizing the biggest school event ever.
Após 30 anos como professora, ela decidiu sair com estilo organizando o maior evento escolar de todos os tempos.
2. To leave or depart in a dramatic or spectacular manner
The band's final concert was amazing—they really went out with a bang.
O último concerto da banda foi incrível—eles realmente fizeram uma saída espetacular.