← BackshareGuessscummily/ˈskʌməli/adverbIn a manner that is dirty, unpleasant, or morally low; resembling or suggesting scum.He scummily avoided paying his share of the bill.The old rags lay scummily in the corner of the shed.The water scummily coated the sides of the bucket.SynonymsdirtilynastilyAntonymscleanly