can't do something to save your life

can't (do something) to save (one's) life

slang Cannot do something well or at all. Ugh, this art assignment is so annoying—I can't draw an apple to save my life. Rachel is so selfish! It's like she can't consider another person's feelings to save her life.
See also: life, save
Farlex Dictionary of Idioms.

can't do something to save your life

SPOKEN
If you say that you can't do something to save your life, you mean that you cannot do it at all. I'm never nervous at exams but I can't study to save my life. He can't sing to save his life but he's a good guitarist.
See also: life, save, something
Collins COBUILD Idioms Dictionary, 3rd ed.

can’t do something to ˌsave your ˈlife

(informal) cannot do something at all or can only do something very badly: He can’t cook to save his life.
See also: life, save, something
Farlex Partner Idioms Dictionary
See also:
  • can't (do something) to save (one's) life
  • couldn't (do something) to save (one's) life
  • back at it
  • back at it (again)
  • can't stand
  • can't stand (someone or something)
  • butt-wipe
  • a fire extinguisher
  • back onto
  • back onto (something)