"proof" or evidence of a statement, phenomenon, etc. obtained from the internet.
I was told that wild honey bees are essentially extinct in north america due to a mite infestation. So I went to Google and found the webidence.
A straight guy who likes to hang around gay guys = stray guy. Sometimes a closet case, but not necessarily so. Possibly bisexual. Often, truly heterosexual.
Brett is a total fag stag. He likes not having competition for all the women at the party. He's not gay, he's stray.