An informal, humorous term for travellers’ diarrhoea experienced in Mexico, though the same illness occurs worldwide. It results from ingesting unfamiliar bacteria, viruses, or parasites in contaminated food or water, with enterotoxigenic E. coli the most common culprit. Symptoms include watery diarrhoea, cramps, nausea, and sometimes fever, typically resolving within days. Prevention centres on food and water discipline: eat freshly cooked hot food, avoid tap water and ice of uncertain origin, and be cautious with raw salads and street food. Oral rehydration is the main treatment, with antibiotics reserved for severe cases under medical advice.