pisserpis‧ser /ˈpɪsə $ -ər/ noun [countable] informal not polite 
an offensive word for a difficult job or activity, or a bad or annoying situation: · The real pisser was investing so much time and effort for zero return.
an offensive word for a difficult job or activity, or a bad or annoying situation: · The real pisser was investing so much time and effort for zero return.