As noted in "TFGOT", "wicked" has long been used by yoof to mean roughly its opposite. A subtler change happened long ago to "like" It used to mean "to please", so if you were fond of something, you would say "it likes me", which is how Shakespeare always puts it. Now, it means "to enjoy", so we say "I like it".
"Temper" seems to be changing its meaning to the opposite of its original meaning, which was "patience, slowness to anger" at the moment. When someone says of some nasty thug "he's got a hell of a temper", they mean that he has little or no temper: temper, traditionally, is what you lose when you get angry.
