Sutcliffe syndrome 

Two heterosexual guys who have a really close friendship so they almost are misstaken to be gay. They share everything in life, limitless, but are not lovers.

Origin: The myth around the friendship between John Lennon and Stuart Sutcliffe before he died at a very young age.

"It was a clear case of Sutcliffe syndrome when John and I met. We acted like lovers, wanted to be by eachothers side all the time."

"I thought I was becoming gay. I was captured by Mike in a really odd way. Since that day we have been partners in crime; soulmates"

Sutcliffe syndrome by NeoBoy May 29, 2007