see that guy over there driving the bmw and playing   [system of a down] way too loud?  he's a giant fistagon
someone who is a complete ass, suggesting an ass that has the capacity to host a large foreign object, such as a fist or a buick
"see that guy over there driving the bmw and playing   [system of a down] way too loud?  he's a giant fistagon" What is the definition of "fistagon"?