Gay

Merriam-Webster says:
Main Entry: 1 gay
Pronunciation: 'gA
Function: adjective
Etymology: Middle English, from Middle French gai
1 a : happily excited : MERRY b : keenly alive and exuberant : having or inducing high spirits
2 a : BRIGHT, LIVELY (gay sunny meadows) b : brilliant in color
3 : given to social pleasures; also : LICENTIOUS
4 a : HOMOSEXUAL b : of, relating to, or used by homosexuals (the gay rights movement) (a gay bar)
synonym see LIVELY
- gay adverb
- gay·ness noun

Nowhere in that definition do I see the words stupid, crappy, fucked up, dumb, retarded, dorky, asinine, unintelligent, ignorant, or broken, so don't use it that way.