What exactly does that mean? Does it mean saying OMG when you are not speaking to Him or about Him? For years, that is what I thought, and it was my pet peeve when people (including Christians) would throw His name around like that.
But I have come to believe that dropping one of His titles casually like that is the very tip of the iceberg. In fact, the word "God" isn't really His name.
When Moses asked who He was at the burning bush, He replied, I am. (Yahweh - a name so holy that the Jewish people will not write it out or say it, in case they might stumble over it). Whenever you see the word LORD in capital letters, it is the Hebrew word spelled yod heh vav heh - the tetragrammaton.