If you describe someone or something as unclean, you consider them to be spiritually or morally bad. They felt as though they had done something discreditable and unclean. unclean thoughts
soiled or likely to soil with dirt or grime; "dirty unswept sidewalks"; "a child in dirty overalls"; "dirty slums"; "piles of dirty dishes"; "put his dirty feet on the clean sheet"; "wore an unclean shirt"; "mining is a dirty job"; "Cinderella did the dirty work while her sisters preened themselves"
Something that is unclean is dirty and likely to cause disease. the Western attitude to insects as being dirty and unclean By bathing in unclean water, they expose themselves to contamination. = dirty clean
Having off-flavor Generally depends on the geographic origin of the beans and how they have been treated A flavor slightly similar to fermenting but without the pungent, rotting taste