Because like the article said, he had just came back from a meeting with Saudi leader, I believe MbS if I'm not mistaken.  You know how in hs or college how you had the foreign friend and they teach you bad words in their language?  It's like that.  MbS probably said to Trump, "when da shit goes down, ya betta be ready  (ya betta be ready)"...and then "cofeve"... "i will stand up"  Then Trump is like "cofveve...I will stand up.  I like that.  I'll tweet it out, it will drive them NUTS"