walk in on
US /wɑːk ɪn ɑːn/
UK /wɑːk ɪn ɑːn/

1.
terserempak, masuk dan melihat
to enter a room and see someone doing something private or embarrassing
:
•
I accidentally walked in on them while they were changing.
Saya tidak sengaja terserempak dengan mereka semasa mereka sedang menukar pakaian.
•
She didn't want anyone to walk in on her while she was practicing her dance moves.
Dia tidak mahu sesiapa pun terserempak dengannya semasa dia sedang berlatih gerakan tariannya.