장난감이랑 책도 여기저기 마구 어질러 놓고 정리할 생각은 하지도 않아요. He left toys and books all over the place in a huddle and never think to clean up them. 여기저기 : here and there 마구 : violently, severely; recklessly, at random

He never think arrangement about his messing toys and books anywhere. 여기저기 마구 means anywhere..

감사합니다! :)

She leaves her toys and books laying around everywhere. She doesn't even think about tidying them up. 마구 어질러 놓다 should be read together.