An American informal term for grandfather, sitting alongside 'grandpa', 'gramps', and 'granddad' in the family of affectionate grandparent nicknames. Grandpop tends to have a warm, East Coast American feel — it's especially associated with mid-Atlantic states like Pennsylvania and New Jersey. It conveys closeness and warmth without being babyish, making it the kind of name a teenager might still comfortably use for the older man who taught them to fish or fix a car.
Every Sunday without fail, we'd drive out to visit grandpop and he'd have a pot of chili already waiting on the stove.
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(US, informal) grandfather.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.