Depends on the context I guess. If like i saw sparks says, it's in third person, than no, unless in the dialogue, though if it's in first person and that's their thoughts it might work.
Also, if you're just typing a journal like this it should be fairly okay, as long as it's understandable, and grammar is still correct.
Well, I think when you're writing something that's more informative than creative, it's probably best to avoid words and phrases that are only used in certain areas.
In stories and other things, though, I think it's fine. Especially if the character is from that area.