Granddaddy
noun, slang
noun, slang ·3 syllables ·Moderate ·College level
Definitions
Noun
- 1 A grandfather. informal
- 2 the father of your father or mother wordnet
- 3 Something that is the greatest or most significant of its kind. informal
"The nature of this gas enables it to absorb the majority of the sun's ultraviolet rays, thus saving the human race from the granddaddy of all sunburns."
Example
More examples"The nature of this gas enables it to absorb the majority of the sun's ultraviolet rays, thus saving the human race from the granddaddy of all sunburns."
Etymology
From grand- + daddy.
More for "granddaddy"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.