I Could Care Less

Or could you? From Uncle John's Bathroom Reader Golden Plunger Awards on its incorrect usage:

This is an easy mistake to make. The correct phrase, of course, is "couldn't care less" - as in, "I don't care at all, so it wouldn't be possible for me to care any less about this." But over the years, that's morphed into a new phrase (with the same meaning), and even though the Harper Dictionary of Contemporary Usage criticized the change in 1975, saying it was "an ignorant debasement of language," "could care less" seems to be around to stay.

Language historian say "couldn't care less" was originally a British phrase that became popular in the Untied States in the 1950s. "Could care less" appeared about a decade later. No one knows exactly why the incorrect form came into being, since it doesn't make sense. But the phrase has stuck, and a lot of grammarians care very much that it's not being used correctly. (Regular people, of course, couldn't care less.)

See other commonly misused words and phrases here.