I like the word oxymoron. I just saw it in Richard's Blog. As you've probably figured out from reading my Blog, the phrase "healthy low-fat" (usually found just before the word "diet") is to me, a presumptuous oxymoron.
If I type the phrase "healthy low-fat" into Google, I get about 148,000 results. Oh, dear! However...
If I type the phrase "healthy low-carb" into Google, I get about 64,400 results. Yee-haw!
So low-fat may be winning the diet war right now, but the tide is definitely turning. Slowly, slowly, catchee monkey.