Bob's your aunt
From two British idioms: "Bob's your uncle" and "Fanny's your aunt"; both of which mean "easy as pie". This particular version casts confusion or doubt on a subject.
Just before diving into the shark-infested waters, he was heard to say, "Everything will be fine, and Bob's your aunt!"
Bobs your aunt
You find out your uncle bob actually had a sex change
Therefore, Bobs your aunt... with balls.... Maybe
Therefore, Bobs your aunt... with balls.... Maybe
Ger: And there ya go, Bobs your uncle
Marty: No, Bobs your aunt with balls bitch!
Marty: No, Bobs your aunt with balls bitch!