A simple, logical, and very practical solution to a problem thought up by a man; a man's innovation. A man uses something simple to accomplish a task or solve a problem. The mannovation takes place usually when a guy needs to do something, but does not want to put forth much effort to do so so he looks for something simple but efective.
EX #1: You want to spread butter on your toast, but all you have is a fork. A knife is a good walk away, and you're already comfortable. But you mannovate and flip the fork and use the handle as a spreading knife. Wipe handle with napkin (or shirt)if necessary. A mannovation just took place.
EX#2:A hot chick in your dorm makes a cake. The cake is done, and wants to share it. Problem is, no one has a knife on hand, so she tasks you with cutting the cake. Sure you could run to your room and get a knife, but thats all the way down the hall. Whip out your driver's license, and bam! Not quite a knife, but cakes cut easy so it gets the job done just fine. If bitching about the cleanliness of the card occurs, rub it on her shirt.