The phrase "with a memory like a sieve" is commonly used to describe someone who easily forgets things. However, there are several other phrases and synonyms that can be used to convey the same meaning. These include "absent-minded," "forgetful," "scatter-brained," "unmindful," and "spacey." Additionally, some people might describe another person's poor memory as "spotty," "inconsistent," or "patchy." Regardless of the specific term used, it's important to remember that forgetfulness is a common issue that can impact anyone. To combat forgetfulness, some people might use memory aids like calendars or reminders, while others might find that mindfulness techniques or brain exercises work for them.