cut in phrasal verb ( see also ↑ cut )
1 . INTERRUPT to interrupt someone who is speaking by saying something:
‘What shall I do?’ Patrick cut in again.
cut in on
Sorry to cut in on you, but there are one or two things I don’t understand.
2 . DRIVING to suddenly drive in front of a moving car in a dangerous way
cut in on
She cut in on a red Ford, forcing the driver to brake heavily.
3 . MACHINE if a part of a machine cuts in, it starts to operate when it is needed:
The safety device cuts in automatically.
4 . INCLUDE SOMEBODY cut somebody in informal to allow someone to take part in a plan or to make money from it
cut somebody in on
Come on, Joey, you promised to cut me in on this one!