(informal)a tout at an auction, sideshow, etc., who calls out to passers-by to attract custom (非正式)(在拍卖会、马戏团穿插表演上)大声招徕顾客者
语源
late Middle English : from bark + -er The original sense was 'a person or animal that barks; noisy protestor', hence the current sense (late 17th cent.)