Jog somebody’s memory
Definition 1 of 1
Pro Tip 1/3Memory Trigger
The phrase suggests using something to stimulate forgotten memories, like a hint or clue. 
Hearing the theme song from her favorite childhood show might jog her memory.
Pro Tip 2/3Not Forceful
It implies a gentle reminder, not forcing someone to remember. 
I just mentioned our high school mascot to jog his memory, not to stress him.
Pro Tip 3/3Common Contexts
Often used in situations where someone is struggling to recall past events or details. 
Would mentioning the beach we visited jog your memory about the trip?