What is Beer Visor?
1.
As one becomes progressively drunker, the beer visor lowers over one's eyes, making everyone look far more attractive than they actually are.
Similar to beer goggles, except that if you tip your head back far enough or lie horizontally, you should be able to see under the visor (which may be somewhat shocking if the gorgeous lady you were chatting up turns out to be a munter).
"Mate, The beer visor came down last night. I pulled a warthog."
See