Basically the equivalent of the phrase "talking to a brick wall", but with text messaging. (Also applies to some chat rooms as well). The brick wall is a person whom you are texting and they are too busy to make real responses to the things you text them, or they are just stupid or a prick. Commonly words like "cool", "wow", "okay", and "lol" will be used. Usually, in situations where the person doesn't want to talk, it would probably be more polite to tell them that you simply dont want to talk with them.
Person 1: Hey
Person 2: Hey
Person 1: ...
Person 2: Whats up?
Person 1: Nm
Person 2: Thats cool
Person 1: Ya
Person 2: I was just hanging out with my friends, we played some video games and stuff :D
Person 1: Okay
Person 2: Uh, yeah. So how has your week been?
Person 1: Good
Person 2: Uh well I have to go...wash the dishes...bye
Person 1: Lol
Person 1: Wow what a texting wall.