1. The romantic love between the brothers Sam and Dean Winchester from the show Supernatural, was previously a blanket term for any incestuous relationship in the Winchester family.
2. Combining the words "Win" and "Incest", a popular term in the anime/manga fandom for any sort of incest.
3. Sometimes just pertains to twincest, but lobbing off the t.
1. "That episode of Supernatural was chalked full of wincest goodness."
2. "Incest is Wincest"