Soreheads

noun

1. A person who has a tendency to be angry or to feel offended.

   "Don't be a sorehead! Forgive, forget and get on with your life."

2. (political slang) A politician who is dissatisfied through failure, lack of recognition, etc.
3. Infection in sheep by the nematode Elaeophora schneideri; elaeophorosis.
4. Fowlpox.