Alex Logic Words and Phrases would like to defend the phrase "I could care less". Some people blister whenever a person says "I could care less" when what they supposedly meant was "I couldn't care less". I used to think (wrongly) the same way as these belligerents do.
"I could care less" simply means a person is so indifferent about some thing that for them to care even less than they do would require work, work which they don't want to bother putting in.
One could further argue that people who say "I couldn't care less" have earned the famous Shakespearean reply "Thou doth protest too much".
For other wacky or not wacky AlexLogicWords and Phrases please check out "Is the Glass half empty or Half full" and "Beat a Dead Horse" which apparently I have not written yet on this site but will in due time, or would that be do time?