adjective - Usually used to describe something extremely random. Can also be used to describe something that ends up being amazingly stupid because of its randomness or lack of purpose. This expression comes from the fact that theres some really retarded shit in Tennessee, such as 6 lane freeways in the middle of nowhere. If you've ever lived there, you know what I'm talking about.
Person A)HOLY SHIT, guess what I just realized! OJ really was guilty!
Person B)Dude, you're straight outta tennessee.

or

Person A)Who the hell builds a military base in the middle of nowhere, Texas?
Peerson B)I don't know, but thats straight outta tennessee!
by whothefuckgiveashit May 30, 2006
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