"Gay" through the agency of semantic shift is rapidly taking on still a new meaning

(especially with teenagers) uncool, unattractive, not socially acceptable: What a gay haircut.; That band is so gay

http://www.macquariedictionary.com.au/anonymous@EA23610781/-/p/dict/slang-g.html?

which itself is smearing (shifting?) into an even wider def, general disparaging term

http://www.peevish.co.uk/slang/g.htm

This shift is punctuated by a recent news report:

A Mormon high school student...disciplined for saying "that's so gay" in class....never meant to demean homosexuals and said no one had warned her the phrase was offensive"

dalehileman