And there are a few more that I knew of, but I forget the names of them now.
__________________ Fingerbang:
1.) The sexual act where a finger is inserted into the vagina or anus. Headbang:
1.) To vigorously nod your head up and down.
So I guess the joke is on the writer's of Napolean Dynamite, who thought they had something clever here. In your face writer's! Napolean is referring to an actual species!