North Korea hasn't agreed to denuclearization (and won't). Preemptive crowing from Trump and his fans plays into Kim Jong Un's strategy, setting the US up for disaster. Either Trump will lie to claim an achievement he didn't get, or get desperate for anything he can call a "win"https://twitter.com/realDonaldTrump/status/988037292932653056 …
I read that too, but I hadn't heard of it as a slur before. Either way, I don't know why Trump chose to use it.