Definition of "Sissy"

‘Sissy is not a name,’ said Mr. Gradgrind. ‘Don’t call yourself Sissy. Call yourself Cecilia.’‘It’s father as calls me Sissy, sir,’ returned the young girl in a trembling voice, and with another curtsey.

1854, Charles Dickens, “Book I, Chapter II”, in Hard Times. For These Times, London: Bradbury & Evans, […]

“He'd give the store away if Sissy and I let him,” said Dreama.

2013, Lee Martin, Southern Psalms, page 70