Another logical fallacy [I Am An Atheist]

I've realized another logical fallacy theists, especially Christians love to commit which I don't know the name of (if it has one); it's essentially the arbitrary changing, applying, and taking of meaning.

For example, when it comes to the word "kind": creationists love to arbitrarily change this word's meaning to whatever fits their liking. When asked for arguments against evolution they will often say that no animal had ever turned into another "kind", and when asked what exactly they mean by "kind" they will say something along the lines of "Well, a dog and another dog can reproduce, a dog and a banana can't". However, when confronted with the fact that the Alaska rabbit and the Florida rabbit cannot successfully reproduce, they'll say "Well, but they're still the same kind of animal", meaning they arbitrarily changed the definition of "kind".
Another example is the question under which circumstances something has meaning or not; I often like to say how an omnipotent god could create a world with only good in it, even though without evil, good has no meaning, which even theists will acknowledge. But apparently, according to the Bible at least, days and nights can exist without the sun, even though in reality those words are DEFINED by it. And furthermore, when I asked a theist what their god was doing before he created everything he pointed out that there couldn't be a "before" if there is no time, but apparently saying "God has always existed" doesn't contradict this?
And thus theists have shown that they love to arbitrarily change, apply, and take meaning of, to, and from things, whatever supports their agenda.