It has become a bad "word" (actually, acronym). Because of the Trumpies. Yes, it is a joke. First, it presupposes that America was "great" in the past, but now isn't. If anything, I would say the reverse is true.

Since WWII (where, arguably, we were "great"), we have meddled in affairs that installed dictators (Pinochet and the Shah both come to mind), propped-up puppets (like the RVN), and generally been real a-holes. But not so much for the past 30 years or so. Except Iraq. Yeah, Saddam has horrible, but he didn't have WMD, and we created ISIS by invading him. Not a great triumph.

But we arguably are "greater" now than we were 30 years ago when we were supporting dictators and meddling in the internal affairs of others. Our economy is better, more jobs, better jobs, healthcare is accessible to more people...etc.

Trump's idea of "great" is building a wall, banning Muslims, and demonizing anyone in the press that dares criticize him. Oh...and subverting democracy so he can sit at the big desk.