|1.||perverted fantasy wingman|
The person who no matter what you're thinking, they're either thinking it or will understand if you "go there". It does not matter how crazy, dirty, whacky, obtuse, or just flat out weird the thought... you know them well enough to know that they're not going to think you belong in an institution if you say it. It's not mutually exclusive to men or women. It's possible to be a man and have a woman that's you wingman and visa versa.
It took a little while to figure it out, but I realized Steve is my perverted fantasy wingman. He often says outloud the perverted things I'm thinking but I'm embarrassed to say.