Question 1

What does "pipe up" mean?

Accepted Answer

to start speaking, especially unexpectedly or after a silence

Question 2

How do you use "pipe up" in a sentence?

Accepted Answer

Just when we thought she agreed, she piped up with a complaint.

Question 3

Is "pipe up" formal or informal?

Accepted Answer

"pipe up" is informal — used mainly in casual conversation. Often used when someone interrupts, contributes unexpectedly, or speaks in a small but noticeable voice.

pipe up

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