Meaning of the word "bill and coo" in English

What does "bill and coo" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

bill and coo

US /bɪl ənd kuː/
UK /bɪl ənd kuː/
"bill and coo" picture

Idiom

1.

to show affection by kissing and caressing, often in a public or overly sentimental way

Example:
The young couple was billing and cooing in the park.
I can't stand to watch them bill and coo all the time.
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