Rick Palkovic sends a few that were missed by previous contributors:
Literally: I’m hearing this used as an all-around intensifier,
usually when the speaker means just its opposite: figuratively. I
once heard political commentator say: “Congressional leaders
literally held a gun to the President’s head!” Don’t we have
laws against this sort of thing?
Et al: Everyone seems to be using this when they mean “etc.”
They seem to think it sounds more intelligent. Better not to use either,
of course, but use “et al.” for people; “etc.”
World-class: A term favored by PR flacks when a more accurate
description is usually “barely competent.”
Endangered species: When all the loggers in the Northwest
lose their jobs, they just have to find other jobs — they aren’t
dead, and neither are their relatives, much less the whole human race.
Casual metaphoric use of this phrase trivializes the enormity of driving
a species into extinction.