1. A person who drinks alcohol to excess habitually
   "The piss artist was a regular at the local bar";
   - alcoholic, alky [informal], dipsomaniac, boozer [informal], lush [N. Amer, informal], soaker [informal], souse [informal], alco [Austral], rumpot [N. Amer, informal], tosspot [informal], dipso [informal], winebibber [archaic], alkie [informal], drunkard, drunk, rummy, sot, inebriate, wino [informal]
    
2. Insulting term of address for people who are stupid, irritating or ridiculous
   "Don't be such a piss artist and apologize for your mistake";

Derived forms: piss artists

Type of: disagreeable person, drinker, imbiber [informal], juicer [N. Amer, informal], soak [informal], sponge [informal], toper [literary], unpleasant person