Cisco Brewers Winter Shredder.
Either it's skunked or just plain gross, I can't tell. It isn't often I think a beer is gross, especially gross to the point that I won't finish it. We'll see if I get half-way through this bottle before I dump it and try another. If the next one tastes the same, it's just gross.
EDIT: This beer isn't gross. The next one was really good. The next day, I had another good one. Then a bad one, then a good one. Seems like there's something up with this 6er, half are good and half are bad.