Green’s Dictionary of Slang

1. a proper name used as the subject of various general phrs., e.g. that’s what’s the matter with Hannah, a phr. of agreement or certainty; since Hannah died, since Hannah was a rag doll, for a very long time; dead as Hannah Emerson, totally dead; he/she doesn’t amount to Hannah, referring to a worthless individual.

1871		Bolivar Bull. (TN) 15 Apr. 1/3: The Slang of Our Day [...] There are ‘that’s what’s the matter with Hannah’.
1890		Dead Bird (Sydney) 25 Jan. 4/4: That’s what’s the matter with Hannah!
1900		T.J. Carey Hebrew Yarns and Dialect Humor 81/2: There are ‘That’s what’s the matter with Hannah,’ / And ‘dead beats’ on every side.

2. a euph. for God and used in various mild oaths, such as so help me Hannah!

1982

M. Braun Judas Tree (1983) 13: ‘Holy Hannah!’ she squealed. ‘I just had a brainstorm!’.

3. an opinion, information.

1935

A.J. Pollock Und. Speaks n.p.: Hannah, an opinion; the low down.