It is a common thought that in rodeo the bull or bronc's testicles are tied up using a flank strap to get it to buck. Similarily a Brodieo is a guy who has his testicles tied up and under the control of his significant other to the point where it is questionable whether or not he even has any testicles at all. A guy that is a Brodieo will do things that are overly romantic and is a complete kiss ass to his girl. He will bend over backwards so that she does not have to lift a finger and risk breaking a nail.
Have you seen Matts facebook status posts? Everyday he says something about being so happy to start a lifelong journey of love with Lisa. He is such a Brodieo. I can't even handle how sappy he is!