what does "dip me in vinegar and call me a fish supper " mean
I saw this sentence in a movie, I know what it means literallly, and I also know that fish supper refers to fish&chips. But I still can't understand this sentance.
I have googled it and got several findings, does it mean " I'm as foolish as a fish, just eat me".
I'm so confused
Somebody please help me. Thx.