Used to describe a situation that, regardless of how much time or effort is put into it, is very unlikely to be completed or produce a favorable result.

Originated from the idea that the 7 days of the week continue to loop endlessly after Sunday.
You can ask Jenny out seven ways 'till Sunday, Bob, but I doubt she'll ever say yes.
by Prekursor November 12, 2007
Get the Seven Ways 'Till Sunday mug.