spring on someone
Present or make known unexpectedly, as in They sprung the news of their engagement on the family last night. This idiom uses spring in the sense of “make a sudden move.” Mark Twain used it in Tom Sawyer (1876): “Old Mr. Jones is going to try to spring something on the people here tonight.”
Words nearby spring on someone
spring ligament,
spring line,
spring lock,
spring mattress,
spring mountains,
spring on someone,
spring onion,
spring peeper,
spring roll,
spring snow,
spring tide