guess what

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guess what

A question that precedes a surprising announcement. It is a set phrase and is often but not always rhetorical. Guess what? Your mother is coming to visit this weekend after all. A: "Guess what?" B: "I have no idea—do you have news?"
See also: guess, what

Guess what!

Inf. a way of starting a conversation; a way of forcing someone into a conversation. Alice: Guess what! Bob: I don't know. What? Alice: I'm going to Europe this summer. Bob: That's very nice. John: Guess what! Jane: What? John: Mary is going to have a baby. Jane: Oh, that's great!
See also: guess

ˌguess ˈwhat

(informal) used to introduce something surprising or exciting that you want to tell somebody: Guess what, Angela’s getting married next month!
See also: guess, what