Meaning of I'll be damned in English:

I'll be damned

phrase

(also I'm damned)
informal
  • 1Used to express a strong negative.

    • ‘I'll be damned if I call her!’
    • ‘I'm damned if I know’
  • 2Used to express surprise.

    • ‘Well, I'll be damned! What brings you here?’
    • ‘Well I'm damned; you are quite right.’
    • ‘Well, I'll be damned! What in tarnation are you doing in these parts?’