(well,) I'll be!

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(well,) I'll be!

An expression of surprise or astonishment, especially regarding some recent revelation. Bob: "You know, if you run your washing machine at night, you can save a lot of money on your electric bill." John: "I'll be, I never knew that before!" Well, I'll be! Who knew so many people would show up to see our concert?

(Well,) I'll be!

Rur. I am very surprised! Charlie: Joe and Sally got married last weekend. Jane: Well, I'll be! I'll be! Bill got the top score on the test!