During instant messaging when you are typing to someone and there is a little message at the bottom stating "so-and-so is entering text..." you stop typing and wait for your friends response, left unaware that you're friend is doing the exact thing.
A person that is particularlyDEXTEROUS at sending TEXT messages, preferably using only one, or at most two, thumbs. These people can send out messages at seemingly unbelievable speeds, amazing those around them with their deftness.
When you are have a breakdown through a text message wether it be an emotional breakdown, a mental breakdown or a nervous breakdown but you are texting someone as you are going through the breakdown and explaining it to them.
I was in the middle of my emotional breakdown when my best friend text and asked me what was going on so I begun texting to him what was going on and I said not only am I having an emotional breakdown now I'm doing it through text so now I'm having a full-blown textdown.