成语词典衒玉贾石叫卖璧玉,实际上卖的却是石头。比喻言不副实。拼音zuì yù jiǎ shí解释叫卖璧玉,实际上卖的却是石头。比喻言不副实。出处汉·扬雄《法言·问道》:衒玉而贾石者,其狙诈乎!近义词鱼目混珠用法作谓语、定语;指名不副实