When you have reached this stage of gay, there is no turning back. You will die in about a month if this diagnosis is given to you.
Initially the only cure for Big Gay is receiving the treatment of "Big Secks" from a girl, however at the point the disease become "terminal" it has already ravaged your body, which will lead to imminent death of the patient.
At this time Scientists in the field of Memeology have searched for a possible cure, but their efforts are fruitless. They recommend for women to "Provide intercourse regularly to your partner, otherwise he may fall to the disease that has killed so many others.
Person 1: "I heard Johnny was diagnosed with Terminal Gay."
Person 2 (female): "If only I had provided him with the cure before It became too late..."
Person 1: "Yep, it's your fault he's gonna die in about a Month"