An "evil clown" refers to a clown character that is harmful, scary, or does bad things. It is used to describe a clown that is associated with mischief, danger, or causing fear. Full definition
People looked at him as an orange - faced evil clown with silly hair. (goodreads.com)
While «It» will likely create some resentment by inspiring a new wave of evil clown sightings nationwide, it should also be appreciated by anyone who wants good scares depicted with class. (pasadenaweekly.com)
Just one day after the movie poster reveal, here we showcase the first trailer for the Warner Bros.'s adaptation, starring Bill Skarsgard as evil clown Pennywise. (highsnobiety.com)