I'm/I'll be damned if...

I'm be damned if I (do something)

rude slang I am determined not to do something. I'm be damned if I let some young upstart like you take control of my company!
See also: damned, if
Farlex Dictionary of Idioms.

I’m/I’ll be ˈdamned if...

(British English also I’m/I’ll be ˈblowed if ...) (spoken) I certainly will not, do not, etc: I’m damned if I will lend any money to that lazy son of mine. ‘Why is she so late?’ ‘I’ll be blowed if I know.’
See also: damned
Farlex Partner Idioms Dictionary
See also:
  • I'm be damned if I (do something)
  • I'll be damned if I (do something)
  • IM
  • damned if (one) does and damned if (one) doesn't
  • damned if I do and damned if I don't
  • damned if you do and damned if you don't
  • damned sure
  • dont
  • jiggered
  • I'll be hanged if I (do something)