The Clue Sadistic person, slangily
The Answer SICKO
The word "sicko" is a slang term used to describe someone who is cruel or enjoys causing pain to others. It often refers to a person with sadistic tendencies. This fits the crossword clue perfectly, as it captures the idea of someone who takes pleasure in the suffering of others. The informal nature of the word also aligns with the "slangily" part of the clue.