Ah, I see! You’re talking about something from your childhood that your grandma had a special name for—probably something that doesn’t get called that anymore. Those little nostalgic words or nicknames from grandparents are often totally unique to families and fade over time, which is why it feels like no one else remembers.
If you tell me what it is, I can help see if it had a regional name or if others your age remember it too—sometimes these old terms were more common than you realize, even if they’ve mostly disappeared now.
What did your grandma call it?