What's Driving Me Bananas Right Now

People who answer a yes or no question while texting with "Y." I've come to learn it means "Yes"; but for a while I thought it was "Why?" And before you jump on me "Xmas you old fuck, you're a handsome idiot!", I don't think that would be the only single-letter-shortcut in the texting etiquette world, no? I know r = "are" u = "you" n = "niggah, please!" and of course w = "who queefed?" so get off my ass; I'm old but I know this language exists.