졸작이 · 졸작을
poor work; my humble work
Example
졸작이지만 끝까지 읽어 주셔서 감사합니다.
It's a humble effort, but thank you for reading it to the end.
Word parts
졸 clumsy+작 work
Literally 'clumsy work.'
Good to know
Writers humbly call their own work 졸작; saying it about someone else's work is a harsh insult.