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.