not say a dicky bird

not say a dicky bird

To not say or communicate anything at all. ("Dicky bird" is sometimes hyphenated.) We've had him detained for four hours, but he won't say a dicky bird to us about his involvement in the robbery.
See also: bird, dicky, not, say
Farlex Dictionary of Idioms.

not say/hear a ˈdicky bird

(British English, informal) say/hear nothing: Don’t look at me! I didn’t say a dicky bird. We haven’t heard a dicky bird from her for weeks.This idiom is from rhyming slang, in which dicky bird stands for ‘word’.
See also: bird, dicky, hear, not, say
Farlex Partner Idioms Dictionary
See also:
  • (I) can't say that I do
  • can't say that I do
  • suffice
  • suffice (it) to say
  • suffice it to say
  • suffice to say...
  • go further
  • one's say
  • (one's) say
  • before you can say "knife"