piss artist

noun3

1. •
   (slang, vulgar) Someone who is frequently drunk.
2. •
   (slang, vulgar) Someone who is incompetent, often a person who purports to be competent yet consequently produces botched results.
3. •
   (slang, vulgar) Someone who frequently ridicules or shows contempt for others.

   • Piss-artists all of them, charlatans who'd rather paint a cold fish than a ripe peach. — 2009