up his ass up her ass meaning someone who is always on another persons case, like always together but even closer together, like 2 buddies hanging out, but.
A form of saying you have so much of something, you literally have to say "up the ass." When using "up the ass" pronounce "the" as "thee".
If someone tells you to "Get your head out of your ass," it means that you have to start paying more attention to what's going on around you. It could also mean.