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.

"Code Brown" is the industry term for when someone has defecated or vomited in the pool, requiring immediate evacuation and thorough cleaning.

It is often the designated code for a hazardous material spill or gas leak.

Informally, medical staff use it to refer to a patient having an unintentional bowel movement , particularly while under anesthesia during surgery.