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Phrase(s): You (just) wait (and see)! [and] Just (you) wait (and see)!
Inf.Wait and see what will happen.; If you wait, you will see that what I predict will be true. • John: You’ll get what you deserve! Just you wait! Jane: Mind your own business. • Bill: Things will get better. You just wait and see! Sue: Sure, but when?
McGrawhill's American Idioms And Phrasal Verbs