herogramhe‧ro‧gram /ˈhɪərəʊɡræm $ ˈhɪroʊ-/ noun [countable] 
a message to someone that says they have done something extremely well: 
The reporter who wrote the article got a herogram from his editor.
a message to someone that says they have done something extremely well: The reporter who wrote the article got a herogram from his editor.