Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Encyclopedia.
Related to pipe up: pipe tobacco
pipe up (with something)
Fig. to interject a comment; to interrupt with a comment. Nick piped up with an interesting thought. You can always count on Alice to pipe up.
Speak up, as in Finally she piped up, "I think I've got the winning ticket," or Pipe up if you want more pancakes. This term originally referred to a high, piping tone. [Mid-1800s]
To join a conversation with an opinion, especially unexpectedly: You should have piped up if you didn't agree with us.