I've taken to using CHUG. Just CHUG. As is Classic-Henkei-Universe-Generations.
It's 4 characters, 1 syllable. It doesn't need to be exhaustive, since the 'extra' lines are sort of implied through the 4 lines chosen. And it sounds cool.
As soon as we start adding a letter for each new sub-line, we are going to end up with absurdly unwieldy and useless acronyms. I don't want to be using CHUGURROFLOL in ten years' time.
But, y'know, whatever.
SofaMan - Occasionally Battling Evil with his Mighty Powers of Indolence