n.1. One that screams, especially one that sings harshly or stridently.
2. Slang A sensational headline.
3. Slang One that evokes screams or laughter: The comedian's act is a real screamer.
4. Slang An exclamation point.
5. Baseball A hard-hit line drive.
6. Any of several large waterfowl of the family Anhimidae of South America, having a harsh resonant call.