can’t win em all
(you) can't win them all
A phrase said, often as an attempt at consolation, when one has lost or failed to achieve a desired result, especially after previous success. "Them" is sometimes abbreviated as "'em." I know you're disappointed to have the lost the game, but you can't win them all, honey. A: "I'm sorry, I know you worked really hard and were expecting an A+." B: "Eh, can't win 'em all."