What is "umchina"

Umchina (pronunciated like 'um-chin-a') is a Korean word, an abbreviated form of ‘mom’s friend’s son.’( Hangul: 엄마 친구 아들) Not a term directly indicating a specific person, but signifies a person who is perfect in everything; abilities, appearances and backgrounds. Usually spoken by a mother to push her son to do better by comparing to an obscurely perfect character referred to as ‘umchina.’