Idioms and Phrases with granddaddy of them all
granddaddy of them all
The first, oldest, or most respected of its kind, as in That computer is the grandaddy of them all. [Colloquial; c. 1900]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.