... in the whole wide world
If it's unquantifiable, many would argue, it cannot be called a fact. But if the speaker believes it to be true, can it really be called a lie?
So, sometimes we say these things and mean them. They might not be true, but they're not really lies.
And othertimes, what I really mean is, "You are so filthy." Sarcasm tends to be lost on toddlers.