grandaddy
noun [ C ] US informal (also granddaddy) uk/ˈɡræn.dæd.i/ us/ˈɡræn.dæd.i/
（外）祖父
a grandfather
I never knew my grandaddy. 我从未见过自己的祖父。
Idiom
the grandaddy of somethingidiom mainly US informal 老祖宗，祖师爷；同类中最大（或最重要、最有影响）的一个
the biggest, most important, or most powerful event or person of their type
"Modern Times" is a classic comedy starring Charlie Chaplin, the grandaddy of comic film actors. 《摩登时代》是一部经典喜剧片，主演是查理‧卓别麟，喜剧电影的鼻祖。