one eyed dog
A spotlight used for poaching animals, esp deer. The reference is to instead of using dogs to chase the animal in question, you "spotlight" it, and it freezes, long enough for you to shoot it, usually from your car.
"Waitin in the front yard sittin on a log, single shot rifle and a one eyed dog, yonder come my kinfolk in the moonlight, Lousiana Saturday night." -from the Mel Mcdaniels song "Louisiana Saturday Night."
one eyed purple dog
Noun. Penis.
I sure can't wait to get ahold of that dude's one eyed purple dog. I'm gonna smother it with cheese, and swallow it.