Man Fuel is any type of liquid intoxicant (i.e. Beer/Liquor) that is ingested by the human male in order to fuel everyday activities. It also fuels ambitions to participate in activities the next day that usually don't get done. Man Fuel also inhibits an unrelentless urge for males to attempt to mate with the opposite sex many times and with as many partners throughout the period of ingesting Man Fuel.
Damn "Jim" after drinkin' that 40 ounces of Man Fuel I was able to mate with that "Lindsey" chick on the back of her car behind Burger King. Boy she really let me have it my way!!