to spoil by poor work; bungle (often fol. by up )

He botched up the job thoroughly.

to do or say in a bungling manner.

to mend or patch in a clumsy manner.

a clumsy or poor piece of work; mess; bungle

He made a complete botch of his first attempt at baking.

a clumsily added part or patch.

a disorderly or confused combination; conglomeration.

noun

bungler , dub , foozler