Sentence:  'Don't be frightened, mistress,' said Quilp, after a pause. 'Your son knows me; I don't eat babies; I don't like 'em. It will be as well to stop that young <WSD>screamer</WSD> though, in case I should be tempted to do him a mischief. Holloa, sir! Will you be quiet?' 
Meaning of the word marked with <WSD> tags:  One who screams; one who shouts; one who sings harshly.