The phrase "big clown" refers to someone who behaves foolishly or acts in a silly manner, often making others laugh or look foolish themselves. Full definition
We had gone together to the circus one day and this big clown with orange hair, a red nose and a big fat belly started shouting at us, gesturing wildly and waving his tiny little hands. (edairynews.com)
Because Cox was so helpful with Steve Levy and fundraising or because national GOP chair, the big clown at strip clubs was helpful? (nystateofpolitics.com)
Those are some big clown shoes to fill, but Skarsgård is up to the challenge. (maddwolf.com)