deviant deviant /ˈdiːviːənt/

adjective

1. () Markedly different from an accepted norm  ( deviate , aberrant , deviant )
   markedly different from an accepted norm
    Aberrant behavior
   aberrant behavior
    Deviant ideas
   deviant ideas
   

noun

1. A person whose behavior deviates from what is acceptable especially in sexual behavior  ( degenerate , deviant , deviate , pervert , perv [Informal] )
   a person whose behavior deviates from what is acceptable especially in sexual behavior