One of my players has done a librarian. Now admittedly this is setting-specialized (a library so large that its own guild-clan has taken care of it for generations as one of the setting elements), but the character's powers are all expressed as Words of Power, learned from musty tomes. And Vicious Mockery is, well, a "shushing."
Another's a gnoll bard. Bone rattle, eerie laughter, howls and other hyena-ish vocalizations in lieu of actual songs or human-style music; more of a mystic with a very primal, unearthly feel. Vicious mockery is of course a peal of unnerving laughter, mystically reinforced.
Nice. I love this sort of thing. Shushing indeed
