botch

Short definition from Wiktionary

Verb

1. 1
   To perform (a task) in an unacceptable or incompetent manner; to make a mess of something
2. 2
   To do something without skill, without care, or clumsily.
3. 3
   To repair or mend clumsily.

Noun

1. 1
   An action, job, or task that has been performed very badly; a ruined, defective, or clumsy piece of work.
2. 2
   A patch put on, or a part of a garment patched or mended in a clumsy manner.
3. 3
   A mistake that is very stupid or embarrassing.
4. 4
   A messy, disorderly or confusing combination; a conglomeration; hodgepodge.
5. 5
   One who makes a mess of something.
6. 6
   A tumour or other malignant swelling.
7. 7
   A case or outbreak of boils or sores.