slith·ery 
/ˈslɪðəri/ adjective
slith·er·i·er; slith·er·i·est /ˈslɪðəri/ adjective [also more slithery; most slithery] 1 : having an unpleasantly slippery surface, feeling, or quality
▪ slithery reptiles 2 : having a flowing and smooth look or way of moving
▪ She wore a sexy, slithery dress.
▪ slithery reptiles
▪ She wore a sexy, slithery dress.
