The time of year where man flu starts to set in and spread from one man to another. Usually quite late or early in the year, around winter time.
Dave: Best be on your guard mate.
Billy: Why?
Dave: It's man flu season, don't want to catch it do you?
Billy: Hell no!!
Billy: Why?
Dave: It's man flu season, don't want to catch it do you?
Billy: Hell no!!
by Stotty146 October 6, 2010
Get the Man Flu Seasonmug.