“butter my butt and call me a biscuit” or “slap my ass and call me Sally” are colloquial expressions of surprise in the southern US.
according to wiktionary, another equivalent phrase is…
”dip me in honey and throw me to the lesbians”

Depressed bitch with a soda addiction-
mmmmmm can't get enough of the fizzy drinks
“butter my butt and call me a biscuit” or “slap my ass and call me Sally” are colloquial expressions of surprise in the southern US.
according to wiktionary, another equivalent phrase is…
”dip me in honey and throw me to the lesbians”
look, I'm as much for being thrown to the lesbians as the next girl, but I refuse to believe anyone has ever said this out loud
i mean. more power to her, but it just seems a lot more cumbersome to say and much less alliterative, which is like 80% of the appeal of the other sayings