1. So perfect and flawless that a bird wouldn't dare chip at it with its beak.
2. Too hard/resilient to be bored into by said proboscis-hammering.
Flickers sometimes make a loud hammering noise on sheet-metal in an attempt to drive other birds away, even though they are obviously aware that metal --- unlike wood --- is impeckable.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi