During the Wei and Jin dynasties, intellectual discourse flourished among the elite, and Wang Yan, a high-ranking minister of the Western Jin, was a renowned master of this art. Even as a youth, he was sharp-tongued and eloquent. While visiting the estate of the literary giant Shan Tao, Wang Yan impressed everyone with his refined appearance and elegant speech. Yet Shan Tao sighed and remarked, "The one who will one day bring ruin to the empire—could it not be this very man?"
As Wang Yan grew up, he developed a passion for the teachings of Laozi and Zhuangzi, skillfully using their Daoist philosophy to reinterpret Confucian classics and expound on profound mysteries. When lecturing, he always wore loose, flowing robes with wide sleeves, held a jade-handled chowry (a fly whisk made from deer tail hair), spoke in a soft, measured tone, and filled his speech with cryptic, empty phrases. Whenever his arguments faltered or didn't quite fit, he would casually change his words on the spot without a second thought. People thus called him "one who alters his words like yellow orpiment."
Wang Yan was notorious for his fickle decisions. He first married his daughter to the crown prince, but when the prince was framed, Wang Yan, fearing entanglement, hastily petitioned for divorce. After the prince's name was cleared, Wang Yan was sentenced to lifelong house arrest for his lack of integrity. As the Western Jin dynasty's royal power struggles escalated into the infamous "War of the Eight Princes," Wang Yan, favored by two powerful princes, was appointed as Imperial Secretary. Yet, he never changed his erratic ways; in his high office, he cared only for personal power, ignoring the realm's welfare. When the Western Jin fell, Wang Yan shifted blame, casually claiming, "I never meddled in state affairs—the fault is not mine." Despite this, he met his end: captured by enemy forces and imprisoned in a civilian hut, where at midnight, the enemy commander ordered the walls pushed over, burying Wang Yan alive under the rubble.
Later, the idiom "reckless talk" came to describe speaking improperly, changing words at will, or making random assertions without thought.
Source: *Jinyang Qiu*
Meaning of the Idiom: Later, the Chinese idiom "信口雌黄" came to describe how speaking improperly, changing words at will, or making random assertions without thought.