(Similar to the G-Virus of Resident Evil)
The zombie-like state which you reside after a day or more on the Greyhound bus, sleeping for five minutes at a time next to someone that smells like an alcohol distillery, and having nothing on your stomach but some Ritz crackers.
"I missed you so much! You look like shit!"
"I've got the G-Virus."
"Wait, she fell asleep in the middle of absence-sex?"
"I can't blame her, man, she'd been awake for three days and had a serious case of the G-Virus."