What is Manflu?
Manflu is just a silly sarcastic term given to men who happen to have a cold. The idea being that some men will exaggerate symptoms in order to extract sympathy or to get them off the hook regarding work, chores or responsibilities.
The female equivalent would be the ''not tonight dear, i have got a headache'' kind of ailment
Of course, manflu, could be real
http://www.manflu.info/index.htm