with a bang
1. With an especially exciting, energetic, or flamboyant flourish; in a flashy, vigorous, or forceful manner. Let's leave the musical number as the last act so we can finish the show with a bang. I'm having a massive party to celebrate my 40th birthday. I want to usher out my 30s with a bang! Let's all do some Jell-O shots and start this party off with a bang!
2. In an extremely violent, destructive manner. I'm worried that if the tensions between these two superpowers don't ease up soon, the whole world might end with a bang. The revolution started with a bang after rebels attacked the government cavalcade.
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