God/Heaven help somebody

God help (one)

A phrase used to acknowledge that one is in or could potentially be in trouble. A: "You'll have to go down into the basement to reset the breakers." B: "...which is full of spiders. God help me." Well, God help you if Mom finds out that you're the one who broke her vase. God help us if she becomes our new boss.
See also: god, help

heaven help (one)

A phrase used to acknowledge that one is in or could potentially be in trouble. A: "You'll have to go down into the basement to reset the breakers." B: "...which is full of spiders. Heaven help me." Well, heaven help you if Mom finds out that you're the one who broke her vase. Heaven help us if she becomes our boss.
See also: heaven, help
Farlex Dictionary of Idioms.

God/Heaven ˈhelp somebody

(spoken) used to say that you are afraid somebody will be in danger or that something bad will happen to them: God help us if this doesn’t work.(Some people find this use offensive.)
See also: god, heaven, help, somebody
Farlex Partner Idioms Dictionary
See also:
  • God help (one)
  • heaven help (one)
  • Heaven help us!
  • (one's) best foot forward
  • best foot forward
  • (as) sure as eggs (is eggs)
  • a penny for them
  • 57
  • and the rest
  • and how