"Skjelm" is an old-fashioned and rarely used word in Norwegian. Means something like "buffoon". It kan be made into an adjective, and also used adverbially, in the form of "skjelmsk". In my dialect, and many others, that would be pronounced "skjelmskt". Only one syllable, but all of the five last consonants are pronounced distinctly. "Skj" is pronounced like "sh" in "short". Very fun to use that word. Sometimes I say it aloud just to cheer myself up.
And in old Norse, there are word forms like "blomstrs" (gen. of "blomstr" - "flower"). All seven consonants are disctinctly pronounced within one syllable, although the voiced r can make it sound more like two.
Do you have any other examples from other languages, of many consonants packed into one syllable? For my collection.