forty ways to Sunday

Thoroughly or completely; in every possible way; from every conceivable angle. Everyone had their money on the reigning champion, but he was beaten forty ways to Sunday by the newcomer. We researched the case forty ways to Sunday, but there didn't seem to be any way that we could win with the evidence at hand. You can plan this out forty ways to Sunday, but I doubt you're gonna say the magic words that get Mom and Dad to let you go to the concert.