Years ago I used to regular the yahoo chatrooms.
I got into a rather heated discussion with some fool on there who told me I was talking ...well you know the word.
I decided to change my name for a laugh, just to annoy the jerk and thought I'd try chat instead of talk, but wasn't allowed so I added the extra 'a' to chaat and finished with the more accepable chit.
I logged back in as chaatchit, and had a hilarious night and it stuck.
I use chaat now because I'm just to lazy to type the rest.
But ... yeah, my name basically means I talk ...