how come?
INFORMAL
This page is about the conversational phrase how come?
Meaning
You can say this if you want to know why something's happened, or why a situation exists.
For example
- "Tomorrow's meeting has been cancelled."
"Really? How come?"
"Arthur said he can't make it." - "I'm quitting my job."
"How come? I thought you liked it."
Contributor: Matt Errey