Yī bēi jiǔ xiàdù, tā de cūlǔ běnxìng yuán xíng bì lù.
After one drink, his rude nature was fully on display.
Tips
usage
毕 = completely; 露 = exposed. Always negative — used when a person's hidden bad character, a scam, or a disguise collapses and the truth becomes undeniable.