It is the name of a humorous, "stinky" puzzle game available on Google Play and Steam where players must solve puzzles to reach a bathroom.
In some regions, like Australia, it refers to a system-wide external emergency (e.g., a pandemic or mass casualty event) that puts extreme pressure on hospital resources. download-code-brown
It is often the designated code for a hazardous material spill or gas leak. It is the name of a humorous, "stinky"