A kind of shirt (ususally an over-shirt) that with time will
sag or move to one side, thus causing one to have to keep
pulling it back to the other side like a type-writer. This happens most commonly with girls as some shirts will move to one side as it
flows, but gets stuck on a boob.
Guy: Hey, you've
got some type-writer action
going on.
Girl: Ugh! I know, this
shirt is so annoying, but cute!