What is BTW?

Yep thats it, it means By The Way. I use it a lot when i'm texting.

Yes, it means, by the way.. I still have a few slangs that I am trying to figure out on the Internet too.

It is one of the illiterate ways of saying "by the way". I hate it when people use such constructions. It is harming the language and many users, that are not native English speakers, or that don't use this type of slang or whatever they call it, don't understand parts of discussions... I really don't understand why people use this form of writing. After all, a longer text earns more on myLot, right?

BTW= By The Way!