当场出彩

Explanation: When the old anti-opera performances, to smear with red water, pretend to look like blood, called out the color. Analogy brought to light the face in front of all the ugly secrets or show. 　　Usage: Partial official; as predicate; means making fools of themselves 　　Source: Mingling 濛 first "half an hour Pai An Jing Qi" Volume 30: "I stick by this couple Kusakabe when, as in private please licensing head, over the results, save the color spot." 　　Examples: Couple of heads when I stick by this, as in private please licensing head, over the results, save ~. ("Half an hour Pai An Jing Qi" Volume XXX) Thesaurus:  behave foolishly or badly in public, make a spectacle of oneself, extempore show oneself up