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During the Sui Dynasty, Yang Guang was plotting to seize the position of Crown Prince. Influenced by Yuwen Shu, he exploited an opportunity to persecute individuals with the surname Li, causing many to flee for their lives.
However, Li Jing, undeterred, visited a temple to seek a divination.
There, he audaciously proclaimed his ambition to become emperor, a desire far beyond his actual standing. Regrettably, the divination revealed that he was destined to be merely an influential minister. Consequently, he had to wait for a more opportune moment.

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Open the tool →口出狂言 (kǒu chū kuáng yán) is a Chinese idiom (chengyu) meaning “to speak arrogantly and boastfully”.
口出狂言 is pronounced kǒu chū kuáng yán in Mandarin Chinese.
Literally, 口出狂言 means “Mouth utters wild words”. It is used to mean “to speak arrogantly and boastfully”.
口出狂言 comes from a classical Chinese story dating back to the modern era. The full story is on this page.
嘴里说出狂妄自大的话。指说话狂妄、放肆。也指胡说八道。