alter cocker Share definition Flag old shit or old fart. an old man who sits around grousing and complaining all the time. That alter cocker was complaining about the pickles and now is whining about the chopped liver. He should up and die already! alter cocker by ken69 January 27, 2009 0 0 Get merch Get the alter cocker mug. Buy Now — $32.95 See more merch