I don't care much for grammar nazis to be honest, but there is one frequently made error that drives me nuts.
When trying to tell someone that you don't care, the proper saying is:
"I couldn't give less of a _____ " or "I couldn't care less."
Even mainstream music artists get it wrong, like Billie Joe Armstrong in Jesus of Suburbia clearly says "... and I could really care less... " Well, fuck you Green Day. Fuck you for re-enforcing all the grammatically inept tards to screw it up even more.
Saying that you could care less about something implies that you could in fact put forth more of an effort to care about what someone is saying, and that it's not the least you could care about something.
You may think it isn't a big deal, but when it's frequently used by the arseholes of NG in an attempt to be a nonchalant badass, you'd think that the least they could do is get their damn saying straight. If you can't even be bothered to get it right, then just stick to something simpler, like "I don't care."
This lesson was brought to you by the word, "DRAAAAAAIIIIIIIIIIIIIINNNNNNNNNNNNNNN NNNNNNNNAGE"
and the number "Milkshake", you sniveling ass.