grandaddy
noun(also granddaddy)
(plural grandaddies, granddaddies)
(North American English, informal)- (also grandfather)
the father of your father or mother （外）祖父；爷爷；姥爷；外公 - the grandaddy
the first or greatest example of something （某事物的）老祖宗，祖师爷 James Brown, the grandaddy of soul music 詹姆斯·布朗，灵魂音乐的鼻祖