Definition4 here
screamer in British English
(ˈskriːmə )
noun
1. a person or thing that screams
2. any goose-like aquatic bird, such as Chauna torquata (crested screamer), of the family Anhimidae of tropical and subtropical South America: order Anseriformes (ducks, geese, etc)
3. someone or something that raises screams of laughter or astonishment
4. US and Canadian slang
a sensational headline
5. Australian slang