Interjection: "
May God blind me!" was once a
serious oath, not sworn in anything but
earnest. It's shortening was partly to avoid offence and partly for brevity. See also gawd blimey.
Part of
a song by
Lonnie Donegan:
'Oh, my
old man's a dustman,
He wears a dustman's hat,
He wears cor-blimey trousers
And he lives in a council flat...'