The horrible virus that infected thousands of gamers on the day that Call of Duty Modern Warfare 2came out, causing it's hosts to stay home 'sick' and play the game in an obsessive vegitative state.
Person 1: Have you seenTyler?
Person 2: No, he's home sick with Modern Warflu.
Person 1: Lucky stiff.
Warflying is the act of searching for Wi-Fi wireless networks by a person in a UFO/IFO, using a portable computer, smartphone, or other mobile computing devices.