Cock of the Walk

Cocky is a world which tends to be associated more though not exclusively but more with men and I was talking last week on the podcast with Ben who came on as a guest to talk about exams Cambridge exams. Cock of the walk is an arrogant person here's an example ever since he got that new promotion he has been cock of the walk ordering people around. A cock and bull story is a ridiculous story that is not thought to be true can you think of an one?