A versatile term used to describe an idiot or an idiot move, sometimes used affectionately between friends or insulting others while highkey judging them. It can be jokingly used or seriouslyoffensive.
An idiot
My friend Paul just spent 300 bucks on a rippedtee. What a yoach.
Look at those hooligans over there, messing with the water fountain. Yoaches! The principal is right there!
An unbelievably sweet and beautiful Korean female who never stops smiling and will always be there for you through thick and thin. She can sometimes appear to be incredibly energetic and talkative on the outside, but she is also very gentle and caring, and will always take care of her friends and family. Yoonha is friends with everyone– she can easily strike up a conversion with any stranger and make them feel welcome, and is one of the friendliest people you will ever meet. She has the best kind of humour, and she never fails to light up the room when she laughs.