month of Sundays, a

month of Sundays

An extremely long, often indefinite period of time. Often used in negative constructions, especially to mean "never." Wow, I haven't been to this part of town in a month of Sunday's. A: "Do you think Samantha will agree to go on a date with Jake?" B: "Not in a month of Sundays!" We'll be here for a month of Sunday's trying to sort through all this paperwork!
See also: month, of, Sundays

month of Sundays, a

A long time, as in I haven't seen Barbara in a month of Sundays. This expression, which would literally mean thirty weeks, has been used hyperbolically since it was first recorded in 1832. One writer suggests it originally connoted a long dreary time, since games and other kinds of amusement used to be forbidden on Sunday.
See also: month, of