BUNGLER
bungler, blunderer, fumbler, bumbler, stumbler, sad sack, botcher, butcher, fuckup
(noun) someone who makes mistakes because of incompetence
Source: WordNet® 3.1
Etymology
Noun
bungler (plural bunglers)
Someone who makes mistakes because of incompetence.
Synonyms
• blunderer, fuckup, schlemiel; see also unskilled person
Anagrams
• blunger
Source: Wiktionary
Bun"gler, n.
Definition: A clumsy, awkward workman; one who bungles.
If to be a dunce or a bungler in any profession be shameful, how much
more ignominious and infamous to a scholar to be such! Barrow.
Source: Webster’s Unabridged Dictionary 1913 Edition