LOL, I've only heard Larry David say that and dude can say whatever he wants. He is hilarious. If ya say real talk I probably won't trust ya Hey, real talk, you must die for that one. Who wants to say "You guys" or "You all" when you can say, "Y'ALL"? So to be honest with you, at the end of the day, it is what it is. You know what I'm sayin'?
I would say the trouble with "I could care less" as sarcasm is that 99% of the time, it completely lacks the vocal inflection that accompanies phrases like "big deal."
I hate it when people say: "But I digress"- If you know you just digressed why did you hit the submit button "whatever!!" "_____is asinine!!!"- probably the most overused phrase on the internet when someone disagrees on something. Most likely they dont know what it really means and are just repeating what they think is cool, but I digress.
Phrases I like to use: "six one half dozen and the other" "robbing Peter to pay Paul" (use this one at least 6-8 times a day ...don't ask how or why) "if it's not something it's something"