for goodness' sake

prepositional phrase3

1. •
   (euphemistic) Used to express frustration, exasperation, annoyance.

   • For goodness' sake, get off the computer! You've been on there for ages!
2. •
   (euphemistic) Used for emphasis

   • They'll try all they can to deceive and to cheat, But for goodness sake don't say I told you. — 1888
3. •
   (euphemistic) Used to express surprise or amazement.

   • For goodness' sake, I spelled that word correctly. I never knew I could do that.