What does Mayella Ewell's final words to jury mean? What is she implying?

But she did not hear the compassion in his invitation. “I got somethin‘ to say an’ then I ain’t gonna say no more. That nigger yonder took advantage of me an‘ if you fine fancy gentlemen don’t wanta do nothin’ about it then you’re all yellow stinkin‘ cowards, stinkin’ cowards, the lot of you. Your fancy airs don’t come to nothin‘—your ma’amin’ and Miss Mayellerin‘ don’t come to nothin’, Mr. Finch. Ch 18