A ruined or defective piece of work: "I have made a miserable botch of this description"(Nathaniel Hawthorne).
A hodgepodge.
[Middle English bocchen, to mend.] botch'er n., botch'y adj.
Synonyms: These verbs mean to harm or spoil through inept or clumsy handling: botch a repair; blow an opportunity; bungle an interview; fumbled my chance to apologize; muffed the painting job.