Cut
Cut off — This phrase can be used in several ways, but its general meaning is “to interrupt or stop something.” (Can be separated.)
While driving, to get in front of another car suddenly: “That red car just cut me off and I almost crashed into it.”
To stop supplying things to or communicating with someone: “His father is rich but he cut him off without any money of his own.”
Cut (it) out — This phrase has the same meaning as saying “Stop it.”
“Hey, cut it out! I was watching that movie, so stop changing the channel!”
Cut in — To interrupt someone when they are speaking.
“I was about to ask that girl on a date, but her friend cut in and I lost the chance.”