be so bold

be so bold

To do something that is (or could be perceived as) surprising, daring, or perhaps inappropriate. The phrase is often used before a question to soften it. May I be so bold as to ask for a second helping? I'd like to propose a different plan, if I may be so bold.
See also: bold
Farlex Dictionary of Idioms.

be/make so ˈbold (as to do something)

(formal) used especially when politely asking a question or making a suggestion which you hope will not offend anyone: May I make so bold, sir, as to suggest that you try the grilled fish?
See also: bold, make
Farlex Partner Idioms Dictionary
See also:
  • be/make so bold
  • make so bold (as to do something)
  • make bold
  • be so bold as to (do something)
  • be so bold as to do
  • have the (brass) neck to (do something)
  • have the neck to do something
  • have the nerve to (do something)
  • have the nerve to do something
  • better left unsaid