1
general::
Phrase(s): (speaking) (quite) frankly [and] frankly speaking
a transitional phrase announcing that the speaker is going to talk in a more familiar and totally forthright manner. • Tom: Speaking quite frankly, I’m not certain she’s the one for the job. Mary: I agree. • Bob: We ought to be looking at housing in a lower price bracket. Bill: Quite frankly, I agree. • "Frankly speaking," said John, "I think you’re out of your mind!"
McGrawhill's American Idioms And Phrasal Verbs