The term 'Sleeping Sickness Bug' is referring to the TSETSE fly, which is a species of fly found in Africa. These flies are known to transmit a parasitic disease called African trypanosomiasis, also known as sleeping sickness. The disease is caused by a parasite that is transmitted through the bite of an infected TSETSE fly. Symptoms of the disease include fever, headaches, joint pain, and extreme fatigue. If left untreated, the disease can be fatal.