/ smʌt; NAmE / noun
1.
[ U ] ( informal ) stories, pictures or comments about sex that deal with it in a way that some people find offensive
2.
[ C , U ] dirt, ash , etc. that causes a black mark on sth; a black mark made by this
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WORD ORIGIN
late Middle English (in the sense defile, corrupt, make obscene ): related to German schmutzen ; compare with smudge . The noun dates from the mid 17th cent.