Oddly, I've been using this word without realizing that it already existed and had a meaning. I've been using this word like, "Look at this shop - when every available surface is dripping with Valentine's Day mummock, it's just so tacky." Or, "When I was young I really liked Hanson. I had posters, t-shirts, a lunchbox, bobbleheads, all sorts of mummock that I threw away when I got to high school." Or, "Shingle your roof red, white, and blue; put flag pins on your Uncle Sam hat; cover your car with magnetic ribbons - none of that mummock makes you a patriot." Sort of a catchall term for themed detritus, I suppose, though it connotes an annoyance at a kind of brainwashed consumer excess. Also used like, "That box is filled with mummock from Aunt Dolores, when we cleaned out her apartment after she died." Not quite garbage- not quite a keepsake; more important than 'stuff' but not as important as 'things'. I pronounce it 'MUH-muck' (rhyme: hummock) not 'Moo-muck'.