[have] a (memory|mind|head|brain) like a sieve - Definition & Meaning

to often forget things due to one's exceptionally poor memoryto often forget things due to one's exceptionally poor memory

The idiom "have a memory like a sieve" likely draws its comparison from a sieve, a kitchen tool used to strain liquids or separate particles, which has many holes or openings. Just as a sieve allows small particles to pass through and be lost, someone described as having a "memory like a sieve" is thought to forget things easily or have trouble retaining information. This expression is used to humorously or critically describe someone who has a poor memory or frequently forgets things. It suggests that their memory is unreliable, much like a sieve that allows things to slip through.The idiom "have a memory like a sieve" likely draws its comparison from a sieve, a kitchen tool used to strain liquids or separate particles, which has many holes or openings. Just as a sieve allows small particles to pass through and be lost, someone described as having a "memory like a sieve" is thought to forget things easily or have trouble retaining information. This expression is used to humorously or critically describe someone who has a poor memory or frequently forgets things. It suggests that their memory is unreliable, much like a sieve that allows things to slip through.

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