call it a day
• decide or agree to stop doing something.
• "after three marriages, many men would have been more than ready to call it a day"
Similar:
admit defeat,
concede defeat,
stop trying,
give up,
give in,
surrender,
capitulate,
be beaten,
despair,
lose heart,
abandon hope,
give up hope,
throw in the towel/sponge,
drop one's bundle,
make a day of it
• devote a whole day to an activity, especially an enjoyable one.