haven't seen you in a month of Sundays
A phrase used when one encounters someone after an extremely long, often indefinite period of time. Hey, Al, haven't seen you in a month of Sundays! How have you been?
(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.