Im Kkeok-jeong
Outlaw leader of butcher (baekjeong) origin from Yangju who raided government offices from Mt. Guwol in Hwanghae under Myeongjong
When royal in-laws seized power after the Eulsa Purge and magistrates' extortion grew, he gathered a band that raided government offices and granaries across Hwanghae and Gyeonggi, sometimes handing the grain to the people. He was captured by the bandit-suppression commander Nam Chi-geun in the first month of 1562 and executed. Yi Ik's Seongho saseol counts him with Hong Gil-dong and Jang Gil-san as the three great outlaws of Joseon.