Socially gay is when a straight guy has the ability to notice if a female friend has changed her hair colour, or bought new shoes, but wont allow the gay guy across the room to shove his cock up your arse!
thanks to Jimmy Carr for definition!
Straight Guy: hey.. wow, i like your new shoes!
Girl: awww thanks!!
Gay Guy: hey man!
Straight Guy: i dont swing that way mate.
Girl: he is just so socially Gay
Girl 2: Yeah i know! and he is straight!