big daddy

noun4

1. •
   (informal) A man of importance by reason of power, size or seniority.
2. •
   (informal) In the southern United States, the male head of a household; sometimes a grandfather.
3. •
   (informal, figurative) Something large, powerful, or superlative.

   • The basic 10K, known as a tenner or studio 10K, has a 20-inch fresnel. The big daddy of the group is the Big Eye tenner, which has a 24-inch lens. — 2008
4. •
   (informal) A stud; a handsome, well-built man.