have a memory like a sieve

have a memory like a sieve

To be exceptionally forgetful or absentminded. I need to start getting more sleep at night, because lately I've had a memory like a sieve. John has a memory like a sieve—I had to leave him three separate reminders about the play tomorrow night.
See also: have, like, memory, sieve
Farlex Dictionary of Idioms.

have a mind/memory like a ˈsieve

(informal) forget things easily or quickly: I’m terribly sorry I didn’t remember your birthday — I’ve got a memory like a sieve.
A sieve is a kitchen tool with small holes in it, used for separating solids from liquids or very small pieces of food from larger pieces.
See also: have, like, memory, mind, sieve
Farlex Partner Idioms Dictionary
See also:
  • have a mind/memory like a sieve
  • a mind like a sieve
  • correctly
  • if memory serves
  • if my memory serves me well, correctly, etc.
  • if my memory serves me correctly
  • pass from
  • pass from (something)
  • enshrine (someone's) memory in (one's) heart
  • have a memory like an elephant