Definition of I'll be dangedUS, informal
- I'll be danged. You found it!
- I'll be danged if I can remember where I left my keys.
: the 9th letter of the English alphabet
: a graphic representation of this letter
: a speech counterpart of orthographic i
: someone aware of possessing a personal individuality : self
used as a connective vowel to join word elements especially of Latin origin
What made you want to look up I'll be danged? Please tell us where you read or heard it (including the quote, if possible).