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Phrase(s): (I) haven’t seen you in a month of Sundays.
Rur. I haven’t seen you in a long time. • Tom: Hi, Bill. Haven’t seen you in a month of Sundays! Bill: Hi, Tom. Long time no see. • Bob: Well, Fred! Come right in! Haven’t seen you in a month of Sundays! Fred: Good to see you, Uncle Bob.
McGrawhill's American Idioms And Phrasal Verbs