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

1.
tubare, fare le moine
to show affection by kissing and caressing, often in a public or overly sentimental way
:
•
The young couple was billing and cooing in the park.
La giovane coppia stava tubando nel parco.
•
I can't stand to watch them bill and coo all the time.
Non sopporto di vederli tubare continuamente.