n. the posterior; one’s butt end. (Because one roosts on it.) Don’t just sit there on your rooster. Get to work.
sneak the sunrise past a rooster
Attempt something that's impossible, or be slick enough to do something by stealth. This predominantly Southern expression was famously used by California Angels first baseman Joe Adock, who said that “trying to sneak a pitch past [Atlanta Braves hitting great] Hank Aaron is like trying to sneak the sunrise past a rooster.”