ACA says carny to the person who will sell to the trade fair but more to a stated as a form of insult, due to which " formerly " people had less education or culture and fought to vista and patience of the audience for their jobs, the clientele, or whatever. Times have changed and the fair vendors are better cultural level, but if you want to annoy someone makes scandals at the fair, will tell him, that he is a showman. It is my personal contribution, without courage of offending someone.