Amanda & Daisy: A Friend in Need?

Episode 2: Amanda's Confession

Amanda: Well actually, something came up. I don't think I can make the party.

COME UP

Meaning: If something comes up, it means that something happens, occurs or appears. It is often something that has to be dealt with straight away. 发生
I'll let him know if anything comes up.
如有什么事,我会告诉他的.

Synonyms: arise, occur, happen, appear, take place, crop up, transpire (formal)