I'll be blowed

(well,) I'll be blowed!

old-fashioned 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 blowed, I never knew that before!" Well, I'll be blowed! Who knew so many people would show up to see our concert?

I'll be blowed

used to express surprise, annoyance, etc. informal
See also: blowed
References in periodicals archive ?
Well I'll Be Blowed has met at four different venues over the years and is grateful to Age UK for providing the current room they use.
Well I'll Be Blowed harmonica players from left, president Eric Houghton, Alf Clay, Alwyn Wilson, and Rob Shannon
So I'll be blowed if I have to carry on covering myself up because the fashion police decree that although my body complies with their strict size requirements, my age has unfortunately slipped over the limit where I'm allowed to "have fun with fashion".
I'LL be blowed - we went all the way to the Black Country's most remarkable building and found the furnace had gone out.
I've wasted my Saturday afternoon watching it, and I'll be blowed if I'm going to waste part of my Saturday evening thinking of something to say about it.