1.) 60s. Nickname or reference to your mom. "Geez, how long did your old lady ground you?" 2.) 70s. This is a term of endearment used to describe a wife, girlfriend or significant other. "The old lady is going to kill me if I don't get this lawn mowed." 3.) Per Captain Obvious: an elderly woman.
The opening of your digestive tract. It's Latin for "ring" or "circle". You know that muscle that contracts when you have to do number two? That's your anus. Also comically referred to as the distant planet "uranus".