Definition
to take someone's life
谋杀某人；枪杀某人
They planned to pop off the traitor, deciding to act at night.
他们计划除掉叛徒，决定在夜间行动。
The movie depicts how an assassin planned to pop off his target.
这部电影描绘了刺客如何计划干掉他的目标。
If they find out about your plan, they might want to pop you off.
如果他们发现你的计划，他们可能会想干掉你。