Term generally used used to show appreciation to someone after they have
done a deed for you.
It can also be used as a sarcastic way of saying "thank you" to someone after they have done
something that you
don't like, or that inconviences you in anyway.
Example 1:
Mike: Here goes that five
bucks I owed you from yesterday.
Chris: Appreiciate you.
Example 2:
Sara: Matt, I think I gave you
herpes.
Matt: Thanks a alot bitch. Appreciate you.