die Lebensmüdigkeit

Literally "life-tiredness," refers to reckless behavior that suggests you don't care about your safety. Used often in a humorous context.

Example:

🇩🇪 - Mit dieser Lebensmüdigkeit fährst du bei Rot über die Ampel? 🇬🇧 - With such disregard for life you're crossing at a red light?