The Spiritual Atheist..
If the purpose of speech is to convey a message. And an atheist calls himself spiritual. Isn't that person misrepresenting himself by using a word that is most largely viewed to be synonymous with "soul"? Even if he himself has his own unique meaning for it (which takes a 5 minute video to understand)
Let's be honest most people hear the word spirit and think soul.. don't they?
It seems like a way of justifying for no reason. If there is a lack of a better word... make a new one. To me I find that people are kind of ridiculed or perceived in a derogatory way if they admit or "come out" with believing they do not have a soul. Like you are somehow less of a person, lacking mystery, etc.. So when someone tries to find a convoluted means of explaining why they call themselves "spiritual". I feel that they are pandering to this unfortunate misperception.